/*  Prototype JavaScript framework, version 1.7
 *  (c) 2005-2010 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {

  Version: '1.7',

  Browser: (function(){
	var ua = navigator.userAgent;
	var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
	return {
	  IE:             !!window.attachEvent && !isOpera,
	  Opera:          isOpera,
	  WebKit:         ua.indexOf('AppleWebKit/') > -1,
	  Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
	  MobileSafari:   /Apple.*Mobile/.test(ua)
	}
  })(),

  BrowserFeatures: {
	XPath: !!document.evaluate,

	SelectorsAPI: !!document.querySelector,

	ElementExtensions: (function() {
	  var constructor = window.Element || window.HTMLElement;
	  return !!(constructor && constructor.prototype);
	})(),
	SpecificElementExtensions: (function() {
	  if (typeof window.HTMLDivElement !== 'undefined')
		return true;

	  var div = document.createElement('div'),
		  form = document.createElement('form'),
		  isSupported = false;

	  if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
		isSupported = true;
	  }

	  div = form = null;

	  return isSupported;
	})()
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },

  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


var Abstract = { };


var Try = {
  these: function() {
	var returnValue;

	for (var i = 0, length = arguments.length; i < length; i++) {
	  var lambda = arguments[i];
	  try {
		returnValue = lambda();
		break;
	  } catch (e) { }
	}

	return returnValue;
  }
};

/* Based on Alex Arnell's inheritance implementation. */

var Class = (function() {

  var IS_DONTENUM_BUGGY = (function(){
	for (var p in { toString: 1 }) {
	  if (p === 'toString') return false;
	}
	return true;
  })();

  function subclass() {};
  function create() {
	var parent = null, properties = $A(arguments);
	if (Object.isFunction(properties[0]))
	  parent = properties.shift();

	function klass() {
	  this.initialize.apply(this, arguments);
	}

	Object.extend(klass, Class.Methods);
	klass.superclass = parent;
	klass.subclasses = [];

	if (parent) {
	  subclass.prototype = parent.prototype;
	  klass.prototype = new subclass;
	  parent.subclasses.push(klass);
	}

	for (var i = 0, length = properties.length; i < length; i++)
	  klass.addMethods(properties[i]);

	if (!klass.prototype.initialize)
	  klass.prototype.initialize = Prototype.emptyFunction;

	klass.prototype.constructor = klass;
	return klass;
  }

  function addMethods(source) {
	var ancestor   = this.superclass && this.superclass.prototype,
		properties = Object.keys(source);

	if (IS_DONTENUM_BUGGY) {
	  if (source.toString != Object.prototype.toString)
		properties.push("toString");
	  if (source.valueOf != Object.prototype.valueOf)
		properties.push("valueOf");
	}

	for (var i = 0, length = properties.length; i < length; i++) {
	  var property = properties[i], value = source[property];
	  if (ancestor && Object.isFunction(value) &&
		  value.argumentNames()[0] == "$super") {
		var method = value;
		value = (function(m) {
		  return function() { return ancestor[m].apply(this, arguments); };
		})(property).wrap(method);

		value.valueOf = method.valueOf.bind(method);
		value.toString = method.toString.bind(method);
	  }
	  this.prototype[property] = value;
	}

	return this;
  }

  return {
	create: create,
	Methods: {
	  addMethods: addMethods
	}
  };
})();
(function() {

  var _toString = Object.prototype.toString,
	  NULL_TYPE = 'Null',
	  UNDEFINED_TYPE = 'Undefined',
	  BOOLEAN_TYPE = 'Boolean',
	  NUMBER_TYPE = 'Number',
	  STRING_TYPE = 'String',
	  OBJECT_TYPE = 'Object',
	  FUNCTION_CLASS = '[object Function]',
	  BOOLEAN_CLASS = '[object Boolean]',
	  NUMBER_CLASS = '[object Number]',
	  STRING_CLASS = '[object String]',
	  ARRAY_CLASS = '[object Array]',
	  DATE_CLASS = '[object Date]',
	  NATIVE_JSON_STRINGIFY_SUPPORT = window.JSON &&
		typeof JSON.stringify === 'function' &&
		JSON.stringify(0) === '0' &&
		typeof JSON.stringify(Prototype.K) === 'undefined';

  function Type(o) {
	switch(o) {
	  case null: return NULL_TYPE;
	  case (void 0): return UNDEFINED_TYPE;
	}
	var type = typeof o;
	switch(type) {
	  case 'boolean': return BOOLEAN_TYPE;
	  case 'number':  return NUMBER_TYPE;
	  case 'string':  return STRING_TYPE;
	}
	return OBJECT_TYPE;
  }

  function extend(destination, source) {
	for (var property in source)
	  destination[property] = source[property];
	return destination;
  }

  function inspect(object) {
	try {
	  if (isUndefined(object)) return 'undefined';
	  if (object === null) return 'null';
	  return object.inspect ? object.inspect() : String(object);
	} catch (e) {
	  if (e instanceof RangeError) return '...';
	  throw e;
	}
  }

  function toJSON(value) {
	return Str('', { '': value }, []);
  }

  function Str(key, holder, stack) {
	var value = holder[key],
		type = typeof value;

	if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {
	  value = value.toJSON(key);
	}

	var _class = _toString.call(value);

	switch (_class) {
	  case NUMBER_CLASS:
	  case BOOLEAN_CLASS:
	  case STRING_CLASS:
		value = value.valueOf();
	}

	switch (value) {
	  case null: return 'null';
	  case true: return 'true';
	  case false: return 'false';
	}

	type = typeof value;
	switch (type) {
	  case 'string':
		return value.inspect(true);
	  case 'number':
		return isFinite(value) ? String(value) : 'null';
	  case 'object':

		for (var i = 0, length = stack.length; i < length; i++) {
		  if (stack[i] === value) { throw new TypeError(); }
		}
		stack.push(value);

		var partial = [];
		if (_class === ARRAY_CLASS) {
		  for (var i = 0, length = value.length; i < length; i++) {
			var str = Str(i, value, stack);
			partial.push(typeof str === 'undefined' ? 'null' : str);
		  }
		  partial = '[' + partial.join(',') + ']';
		} else {
		  var keys = Object.keys(value);
		  for (var i = 0, length = keys.length; i < length; i++) {
			var key = keys[i], str = Str(key, value, stack);
			if (typeof str !== "undefined") {
			   partial.push(key.inspect(true)+ ':' + str);
			 }
		  }
		  partial = '{' + partial.join(',') + '}';
		}
		stack.pop();
		return partial;
	}
  }

  function stringify(object) {
	return JSON.stringify(object);
  }

  function toQueryString(object) {
	return $H(object).toQueryString();
  }

  function toHTML(object) {
	return object && object.toHTML ? object.toHTML() : String.interpret(object);
  }

  function keys(object) {
	if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
	var results = [];
	for (var property in object) {
	  if (object.hasOwnProperty(property)) {
		results.push(property);
	  }
	}
	return results;
  }

  function values(object) {
	var results = [];
	for (var property in object)
	  results.push(object[property]);
	return results;
  }

  function clone(object) {
	return extend({ }, object);
  }

  function isElement(object) {
	return !!(object && object.nodeType == 1);
  }

  function isArray(object) {
	return _toString.call(object) === ARRAY_CLASS;
  }

  var hasNativeIsArray = (typeof Array.isArray == 'function')
	&& Array.isArray([]) && !Array.isArray({});

  if (hasNativeIsArray) {
	isArray = Array.isArray;
  }

  function isHash(object) {
	return object instanceof Hash;
  }

  function isFunction(object) {
	return _toString.call(object) === FUNCTION_CLASS;
  }

  function isString(object) {
	return _toString.call(object) === STRING_CLASS;
  }

  function isNumber(object) {
	return _toString.call(object) === NUMBER_CLASS;
  }

  function isDate(object) {
	return _toString.call(object) === DATE_CLASS;
  }

  function isUndefined(object) {
	return typeof object === "undefined";
  }

  extend(Object, {
	extend:        extend,
	inspect:       inspect,
	toJSON:        NATIVE_JSON_STRINGIFY_SUPPORT ? stringify : toJSON,
	toQueryString: toQueryString,
	toHTML:        toHTML,
	keys:          Object.keys || keys,
	values:        values,
	clone:         clone,
	isElement:     isElement,
	isArray:       isArray,
	isHash:        isHash,
	isFunction:    isFunction,
	isString:      isString,
	isNumber:      isNumber,
	isDate:        isDate,
	isUndefined:   isUndefined
  });
})();
Object.extend(Function.prototype, (function() {
  var slice = Array.prototype.slice;

  function update(array, args) {
	var arrayLength = array.length, length = args.length;
	while (length--) array[arrayLength + length] = args[length];
	return array;
  }

  function merge(array, args) {
	array = slice.call(array, 0);
	return update(array, args);
  }

  function argumentNames() {
	var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
	  .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
	  .replace(/\s+/g, '').split(',');
	return names.length == 1 && !names[0] ? [] : names;
  }

  function bind(context) {
	if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
	var __method = this, args = slice.call(arguments, 1);
	return function() {
	  var a = merge(args, arguments);
	  return __method.apply(context, a);
	}
  }

  function bindAsEventListener(context) {
	var __method = this, args = slice.call(arguments, 1);
	return function(event) {
	  var a = update([event || window.event], args);
	  return __method.apply(context, a);
	}
  }

  function curry() {
	if (!arguments.length) return this;
	var __method = this, args = slice.call(arguments, 0);
	return function() {
	  var a = merge(args, arguments);
	  return __method.apply(this, a);
	}
  }

  function delay(timeout) {
	var __method = this, args = slice.call(arguments, 1);
	timeout = timeout * 1000;
	return window.setTimeout(function() {
	  return __method.apply(__method, args);
	}, timeout);
  }

  function defer() {
	var args = update([0.01], arguments);
	return this.delay.apply(this, args);
  }

  function wrap(wrapper) {
	var __method = this;
	return function() {
	  var a = update([__method.bind(this)], arguments);
	  return wrapper.apply(this, a);
	}
  }

  function methodize() {
	if (this._methodized) return this._methodized;
	var __method = this;
	return this._methodized = function() {
	  var a = update([this], arguments);
	  return __method.apply(null, a);
	};
  }

  return {
	argumentNames:       argumentNames,
	bind:                bind,
	bindAsEventListener: bindAsEventListener,
	curry:               curry,
	delay:               delay,
	defer:               defer,
	wrap:                wrap,
	methodize:           methodize
  }
})());



(function(proto) {


  function toISOString() {
	return this.getUTCFullYear() + '-' +
	  (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
	  this.getUTCDate().toPaddedString(2) + 'T' +
	  this.getUTCHours().toPaddedString(2) + ':' +
	  this.getUTCMinutes().toPaddedString(2) + ':' +
	  this.getUTCSeconds().toPaddedString(2) + 'Z';
  }


  function toJSON() {
	return this.toISOString();
  }

  if (!proto.toISOString) proto.toISOString = toISOString;
  if (!proto.toJSON) proto.toJSON = toJSON;

})(Date.prototype);


RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};
var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
	this.callback = callback;
	this.frequency = frequency;
	this.currentlyExecuting = false;

	this.registerCallback();
  },

  registerCallback: function() {
	this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
	this.callback(this);
  },

  stop: function() {
	if (!this.timer) return;
	clearInterval(this.timer);
	this.timer = null;
  },

  onTimerEvent: function() {
	if (!this.currentlyExecuting) {
	  try {
		this.currentlyExecuting = true;
		this.execute();
		this.currentlyExecuting = false;
	  } catch(e) {
		this.currentlyExecuting = false;
		throw e;
	  }
	}
  }
});
Object.extend(String, {
  interpret: function(value) {
	return value == null ? '' : String(value);
  },
  specialChar: {
	'\b': '\\b',
	'\t': '\\t',
	'\n': '\\n',
	'\f': '\\f',
	'\r': '\\r',
	'\\': '\\\\'
  }
});

Object.extend(String.prototype, (function() {
  var NATIVE_JSON_PARSE_SUPPORT = window.JSON &&
	typeof JSON.parse === 'function' &&
	JSON.parse('{"test": true}').test;

  function prepareReplacement(replacement) {
	if (Object.isFunction(replacement)) return replacement;
	var template = new Template(replacement);
	return function(match) { return template.evaluate(match) };
  }

  function gsub(pattern, replacement) {
	var result = '', source = this, match;
	replacement = prepareReplacement(replacement);

	if (Object.isString(pattern))
	  pattern = RegExp.escape(pattern);

	if (!(pattern.length || pattern.source)) {
	  replacement = replacement('');
	  return replacement + source.split('').join(replacement) + replacement;
	}

	while (source.length > 0) {
	  if (match = source.match(pattern)) {
		result += source.slice(0, match.index);
		result += String.interpret(replacement(match));
		source  = source.slice(match.index + match[0].length);
	  } else {
		result += source, source = '';
	  }
	}
	return result;
  }

  function sub(pattern, replacement, count) {
	replacement = prepareReplacement(replacement);
	count = Object.isUndefined(count) ? 1 : count;

	return this.gsub(pattern, function(match) {
	  if (--count < 0) return match[0];
	  return replacement(match);
	});
  }

  function scan(pattern, iterator) {
	this.gsub(pattern, iterator);
	return String(this);
  }

  function truncate(length, truncation) {
	length = length || 30;
	truncation = Object.isUndefined(truncation) ? '...' : truncation;
	return this.length > length ?
	  this.slice(0, length - truncation.length) + truncation : String(this);
  }

  function strip() {
	return this.replace(/^\s+/, '').replace(/\s+$/, '');
  }

  function stripTags() {
	return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
  }

  function stripScripts() {
	return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  }

  function extractScripts() {
	var matchAll = new RegExp(Prototype.ScriptFragment, 'img'),
		matchOne = new RegExp(Prototype.ScriptFragment, 'im');
	return (this.match(matchAll) || []).map(function(scriptTag) {
	  return (scriptTag.match(matchOne) || ['', ''])[1];
	});
  }

  function evalScripts() {
	return this.extractScripts().map(function(script) { return eval(script) });
  }

  function escapeHTML() {
	return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  }

  function unescapeHTML() {
	return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');
  }


  function toQueryParams(separator) {
	var match = this.strip().match(/([^?#]*)(#.*)?$/);
	if (!match) return { };

	return match[1].split(separator || '&').inject({ }, function(hash, pair) {
	  if ((pair = pair.split('='))[0]) {
		var key = decodeURIComponent(pair.shift()),
			value = pair.length > 1 ? pair.join('=') : pair[0];

		if (value != undefined) value = decodeURIComponent(value);

		if (key in hash) {
		  if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
		  hash[key].push(value);
		}
		else hash[key] = value;
	  }
	  return hash;
	});
  }

  function toArray() {
	return this.split('');
  }

  function succ() {
	return this.slice(0, this.length - 1) +
	  String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  }

  function times(count) {
	return count < 1 ? '' : new Array(count + 1).join(this);
  }

  function camelize() {
	return this.replace(/-+(.)?/g, function(match, chr) {
	  return chr ? chr.toUpperCase() : '';
	});
  }

  function capitalize() {
	return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  }

  function underscore() {
	return this.replace(/::/g, '/')
			   .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')
			   .replace(/([a-z\d])([A-Z])/g, '$1_$2')
			   .replace(/-/g, '_')
			   .toLowerCase();
  }

  function dasherize() {
	return this.replace(/_/g, '-');
  }

  function inspect(useDoubleQuotes) {
	var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
	  if (character in String.specialChar) {
		return String.specialChar[character];
	  }
	  return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
	});
	if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
	return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  }

  function unfilterJSON(filter) {
	return this.replace(filter || Prototype.JSONFilter, '$1');
  }

  function isJSON() {
	var str = this;
	if (str.blank()) return false;
	str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@');
	str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
	str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
	return (/^[\],:{}\s]*$/).test(str);
  }

  function evalJSON(sanitize) {
	var json = this.unfilterJSON(),
		cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
	if (cx.test(json)) {
	  json = json.replace(cx, function (a) {
		return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
	  });
	}
	try {
	  if (!sanitize || json.isJSON()) return eval('(' + json + ')');
	} catch (e) { }
	throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  }

  function parseJSON() {
	var json = this.unfilterJSON();
	return JSON.parse(json);
  }

  function include(pattern) {
	return this.indexOf(pattern) > -1;
  }

  function startsWith(pattern) {
	return this.lastIndexOf(pattern, 0) === 0;
  }

  function endsWith(pattern) {
	var d = this.length - pattern.length;
	return d >= 0 && this.indexOf(pattern, d) === d;
  }

  function empty() {
	return this == '';
  }

  function blank() {
	return /^\s*$/.test(this);
  }

  function interpolate(object, pattern) {
	return new Template(this, pattern).evaluate(object);
  }

  return {
	gsub:           gsub,
	sub:            sub,
	scan:           scan,
	truncate:       truncate,
	strip:          String.prototype.trim || strip,
	stripTags:      stripTags,
	stripScripts:   stripScripts,
	extractScripts: extractScripts,
	evalScripts:    evalScripts,
	escapeHTML:     escapeHTML,
	unescapeHTML:   unescapeHTML,
	toQueryParams:  toQueryParams,
	parseQuery:     toQueryParams,
	toArray:        toArray,
	succ:           succ,
	times:          times,
	camelize:       camelize,
	capitalize:     capitalize,
	underscore:     underscore,
	dasherize:      dasherize,
	inspect:        inspect,
	unfilterJSON:   unfilterJSON,
	isJSON:         isJSON,
	evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,
	include:        include,
	startsWith:     startsWith,
	endsWith:       endsWith,
	empty:          empty,
	blank:          blank,
	interpolate:    interpolate
  };
})());

var Template = Class.create({
  initialize: function(template, pattern) {
	this.template = template.toString();
	this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
	if (object && Object.isFunction(object.toTemplateReplacements))
	  object = object.toTemplateReplacements();

	return this.template.gsub(this.pattern, function(match) {
	  if (object == null) return (match[1] + '');

	  var before = match[1] || '';
	  if (before == '\\') return match[2];

	  var ctx = object, expr = match[3],
		  pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;

	  match = pattern.exec(expr);
	  if (match == null) return before;

	  while (match != null) {
		var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];
		ctx = ctx[comp];
		if (null == ctx || '' == match[3]) break;
		expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
		match = pattern.exec(expr);
	  }

	  return before + String.interpret(ctx);
	});
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = (function() {
  function each(iterator, context) {
	var index = 0;
	try {
	  this._each(function(value) {
		iterator.call(context, value, index++);
	  });
	} catch (e) {
	  if (e != $break) throw e;
	}
	return this;
  }

  function eachSlice(number, iterator, context) {
	var index = -number, slices = [], array = this.toArray();
	if (number < 1) return array;
	while ((index += number) < array.length)
	  slices.push(array.slice(index, index+number));
	return slices.collect(iterator, context);
  }

  function all(iterator, context) {
	iterator = iterator || Prototype.K;
	var result = true;
	this.each(function(value, index) {
	  result = result && !!iterator.call(context, value, index);
	  if (!result) throw $break;
	});
	return result;
  }

  function any(iterator, context) {
	iterator = iterator || Prototype.K;
	var result = false;
	this.each(function(value, index) {
	  if (result = !!iterator.call(context, value, index))
		throw $break;
	});
	return result;
  }

  function collect(iterator, context) {
	iterator = iterator || Prototype.K;
	var results = [];
	this.each(function(value, index) {
	  results.push(iterator.call(context, value, index));
	});
	return results;
  }

  function detect(iterator, context) {
	var result;
	this.each(function(value, index) {
	  if (iterator.call(context, value, index)) {
		result = value;
		throw $break;
	  }
	});
	return result;
  }

  function findAll(iterator, context) {
	var results = [];
	this.each(function(value, index) {
	  if (iterator.call(context, value, index))
		results.push(value);
	});
	return results;
  }

  function grep(filter, iterator, context) {
	iterator = iterator || Prototype.K;
	var results = [];

	if (Object.isString(filter))
	  filter = new RegExp(RegExp.escape(filter));

	this.each(function(value, index) {
	  if (filter.match(value))
		results.push(iterator.call(context, value, index));
	});
	return results;
  }

  function include(object) {
	if (Object.isFunction(this.indexOf))
	  if (this.indexOf(object) != -1) return true;

	var found = false;
	this.each(function(value) {
	  if (value == object) {
		found = true;
		throw $break;
	  }
	});
	return found;
  }

  function inGroupsOf(number, fillWith) {
	fillWith = Object.isUndefined(fillWith) ? null : fillWith;
	return this.eachSlice(number, function(slice) {
	  while(slice.length < number) slice.push(fillWith);
	  return slice;
	});
  }

  function inject(memo, iterator, context) {
	this.each(function(value, index) {
	  memo = iterator.call(context, memo, value, index);
	});
	return memo;
  }

  function invoke(method) {
	var args = $A(arguments).slice(1);
	return this.map(function(value) {
	  return value[method].apply(value, args);
	});
  }

  function max(iterator, context) {
	iterator = iterator || Prototype.K;
	var result;
	this.each(function(value, index) {
	  value = iterator.call(context, value, index);
	  if (result == null || value >= result)
		result = value;
	});
	return result;
  }

  function min(iterator, context) {
	iterator = iterator || Prototype.K;
	var result;
	this.each(function(value, index) {
	  value = iterator.call(context, value, index);
	  if (result == null || value < result)
		result = value;
	});
	return result;
  }

  function partition(iterator, context) {
	iterator = iterator || Prototype.K;
	var trues = [], falses = [];
	this.each(function(value, index) {
	  (iterator.call(context, value, index) ?
		trues : falses).push(value);
	});
	return [trues, falses];
  }

  function pluck(property) {
	var results = [];
	this.each(function(value) {
	  results.push(value[property]);
	});
	return results;
  }

  function reject(iterator, context) {
	var results = [];
	this.each(function(value, index) {
	  if (!iterator.call(context, value, index))
		results.push(value);
	});
	return results;
  }

  function sortBy(iterator, context) {
	return this.map(function(value, index) {
	  return {
		value: value,
		criteria: iterator.call(context, value, index)
	  };
	}).sort(function(left, right) {
	  var a = left.criteria, b = right.criteria;
	  return a < b ? -1 : a > b ? 1 : 0;
	}).pluck('value');
  }

  function toArray() {
	return this.map();
  }

  function zip() {
	var iterator = Prototype.K, args = $A(arguments);
	if (Object.isFunction(args.last()))
	  iterator = args.pop();

	var collections = [this].concat(args).map($A);
	return this.map(function(value, index) {
	  return iterator(collections.pluck(index));
	});
  }

  function size() {
	return this.toArray().length;
  }

  function inspect() {
	return '#<Enumerable:' + this.toArray().inspect() + '>';
  }









  return {
	each:       each,
	eachSlice:  eachSlice,
	all:        all,
	every:      all,
	any:        any,
	some:       any,
	collect:    collect,
	map:        collect,
	detect:     detect,
	findAll:    findAll,
	select:     findAll,
	filter:     findAll,
	grep:       grep,
	include:    include,
	member:     include,
	inGroupsOf: inGroupsOf,
	inject:     inject,
	invoke:     invoke,
	max:        max,
	min:        min,
	partition:  partition,
	pluck:      pluck,
	reject:     reject,
	sortBy:     sortBy,
	toArray:    toArray,
	entries:    toArray,
	zip:        zip,
	size:       size,
	inspect:    inspect,
	find:       detect
  };
})();

function $A(iterable) {
  if (!iterable) return [];
  if ('toArray' in Object(iterable)) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}


function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

Array.from = $A;


(function() {
  var arrayProto = Array.prototype,
	  slice = arrayProto.slice,
	  _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available

  function each(iterator, context) {
	for (var i = 0, length = this.length >>> 0; i < length; i++) {
	  if (i in this) iterator.call(context, this[i], i, this);
	}
  }
  if (!_each) _each = each;

  function clear() {
	this.length = 0;
	return this;
  }

  function first() {
	return this[0];
  }

  function last() {
	return this[this.length - 1];
  }

  function compact() {
	return this.select(function(value) {
	  return value != null;
	});
  }

  function flatten() {
	return this.inject([], function(array, value) {
	  if (Object.isArray(value))
		return array.concat(value.flatten());
	  array.push(value);
	  return array;
	});
  }

  function without() {
	var values = slice.call(arguments, 0);
	return this.select(function(value) {
	  return !values.include(value);
	});
  }

  function reverse(inline) {
	return (inline === false ? this.toArray() : this)._reverse();
  }

  function uniq(sorted) {
	return this.inject([], function(array, value, index) {
	  if (0 == index || (sorted ? array.last() != value : !array.include(value)))
		array.push(value);
	  return array;
	});
  }

  function intersect(array) {
	return this.uniq().findAll(function(item) {
	  return array.detect(function(value) { return item === value });
	});
  }


  function clone() {
	return slice.call(this, 0);
  }

  function size() {
	return this.length;
  }

  function inspect() {
	return '[' + this.map(Object.inspect).join(', ') + ']';
  }

  function indexOf(item, i) {
	i || (i = 0);
	var length = this.length;
	if (i < 0) i = length + i;
	for (; i < length; i++)
	  if (this[i] === item) return i;
	return -1;
  }

  function lastIndexOf(item, i) {
	i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
	var n = this.slice(0, i).reverse().indexOf(item);
	return (n < 0) ? n : i - n - 1;
  }

  function concat() {
	var array = slice.call(this, 0), item;
	for (var i = 0, length = arguments.length; i < length; i++) {
	  item = arguments[i];
	  if (Object.isArray(item) && !('callee' in item)) {
		for (var j = 0, arrayLength = item.length; j < arrayLength; j++)
		  array.push(item[j]);
	  } else {
		array.push(item);
	  }
	}
	return array;
  }

  Object.extend(arrayProto, Enumerable);

  if (!arrayProto._reverse)
	arrayProto._reverse = arrayProto.reverse;

  Object.extend(arrayProto, {
	_each:     _each,
	clear:     clear,
	first:     first,
	last:      last,
	compact:   compact,
	flatten:   flatten,
	without:   without,
	reverse:   reverse,
	uniq:      uniq,
	intersect: intersect,
	clone:     clone,
	toArray:   clone,
	size:      size,
	inspect:   inspect
  });

  var CONCAT_ARGUMENTS_BUGGY = (function() {
	return [].concat(arguments)[0][0] !== 1;
  })(1,2)

  if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;

  if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
  if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
})();
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {
  function initialize(object) {
	this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
  }


  function _each(iterator) {
	for (var key in this._object) {
	  var value = this._object[key], pair = [key, value];
	  pair.key = key;
	  pair.value = value;
	  iterator(pair);
	}
  }

  function set(key, value) {
	return this._object[key] = value;
  }

  function get(key) {
	if (this._object[key] !== Object.prototype[key])
	  return this._object[key];
  }

  function unset(key) {
	var value = this._object[key];
	delete this._object[key];
	return value;
  }

  function toObject() {
	return Object.clone(this._object);
  }



  function keys() {
	return this.pluck('key');
  }

  function values() {
	return this.pluck('value');
  }

  function index(value) {
	var match = this.detect(function(pair) {
	  return pair.value === value;
	});
	return match && match.key;
  }

  function merge(object) {
	return this.clone().update(object);
  }

  function update(object) {
	return new Hash(object).inject(this, function(result, pair) {
	  result.set(pair.key, pair.value);
	  return result;
	});
  }

  function toQueryPair(key, value) {
	if (Object.isUndefined(value)) return key;
	return key + '=' + encodeURIComponent(String.interpret(value));
  }

  function toQueryString() {
	return this.inject([], function(results, pair) {
	  var key = encodeURIComponent(pair.key), values = pair.value;

	  if (values && typeof values == 'object') {
		if (Object.isArray(values)) {
		  var queryValues = [];
		  for (var i = 0, len = values.length, value; i < len; i++) {
			value = values[i];
			queryValues.push(toQueryPair(key, value));
		  }
		  return results.concat(queryValues);
		}
	  } else results.push(toQueryPair(key, values));
	  return results;
	}).join('&');
  }

  function inspect() {
	return '#<Hash:{' + this.map(function(pair) {
	  return pair.map(Object.inspect).join(': ');
	}).join(', ') + '}>';
  }

  function clone() {
	return new Hash(this);
  }

  return {
	initialize:             initialize,
	_each:                  _each,
	set:                    set,
	get:                    get,
	unset:                  unset,
	toObject:               toObject,
	toTemplateReplacements: toObject,
	keys:                   keys,
	values:                 values,
	index:                  index,
	merge:                  merge,
	update:                 update,
	toQueryString:          toQueryString,
	inspect:                inspect,
	toJSON:                 toObject,
	clone:                  clone
  };
})());

Hash.from = $H;
Object.extend(Number.prototype, (function() {
  function toColorPart() {
	return this.toPaddedString(2, 16);
  }

  function succ() {
	return this + 1;
  }

  function times(iterator, context) {
	$R(0, this, true).each(iterator, context);
	return this;
  }

  function toPaddedString(length, radix) {
	var string = this.toString(radix || 10);
	return '0'.times(length - string.length) + string;
  }

  function abs() {
	return Math.abs(this);
  }

  function round() {
	return Math.round(this);
  }

  function ceil() {
	return Math.ceil(this);
  }

  function floor() {
	return Math.floor(this);
  }

  return {
	toColorPart:    toColorPart,
	succ:           succ,
	times:          times,
	toPaddedString: toPaddedString,
	abs:            abs,
	round:          round,
	ceil:           ceil,
	floor:          floor
  };
})());

function $R(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
}

var ObjectRange = Class.create(Enumerable, (function() {
  function initialize(start, end, exclusive) {
	this.start = start;
	this.end = end;
	this.exclusive = exclusive;
  }

  function _each(iterator) {
	var value = this.start;
	while (this.include(value)) {
	  iterator(value);
	  value = value.succ();
	}
  }

  function include(value) {
	if (value < this.start)
	  return false;
	if (this.exclusive)
	  return value < this.end;
	return value <= this.end;
  }

  return {
	initialize: initialize,
	_each:      _each,
	include:    include
  };
})());



var Ajax = {
  getTransport: function() {
	return Try.these(
	  function() {return new XMLHttpRequest()},
	  function() {return new ActiveXObject('Msxml2.XMLHTTP')},
	  function() {return new ActiveXObject('Microsoft.XMLHTTP')}
	) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
	this.responders._each(iterator);
  },

  register: function(responder) {
	if (!this.include(responder))
	  this.responders.push(responder);
  },

  unregister: function(responder) {
	this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
	this.each(function(responder) {
	  if (Object.isFunction(responder[callback])) {
		try {
		  responder[callback].apply(responder, [request, transport, json]);
		} catch (e) { }
	  }
	});
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});
Ajax.Base = Class.create({
  initialize: function(options) {
	this.options = {
	  method:       'post',
	  asynchronous: true,
	  contentType:  'application/x-www-form-urlencoded',
	  encoding:     'UTF-8',
	  parameters:   '',
	  evalJSON:     true,
	  evalJS:       true
	};
	Object.extend(this.options, options || { });

	this.options.method = this.options.method.toLowerCase();

	if (Object.isHash(this.options.parameters))
	  this.options.parameters = this.options.parameters.toObject();
  }
});
Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
	$super(options);
	this.transport = Ajax.getTransport();
	this.request(url);
  },

  request: function(url) {
	this.url = url;
	this.method = this.options.method;
	var params = Object.isString(this.options.parameters) ?
		  this.options.parameters :
		  Object.toQueryString(this.options.parameters);

	if (!['get', 'post'].include(this.method)) {
	  params += (params ? '&' : '') + "_method=" + this.method;
	  this.method = 'post';
	}

	if (params && this.method === 'get') {
	  this.url += (this.url.include('?') ? '&' : '?') + params;
	}

	this.parameters = params.toQueryParams();

	try {
	  var response = new Ajax.Response(this);
	  if (this.options.onCreate) this.options.onCreate(response);
	  Ajax.Responders.dispatch('onCreate', this, response);

	  this.transport.open(this.method.toUpperCase(), this.url,
		this.options.asynchronous);

	  if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

	  this.transport.onreadystatechange = this.onStateChange.bind(this);
	  this.setRequestHeaders();

	  this.body = this.method == 'post' ? (this.options.postBody || params) : null;
	  this.transport.send(this.body);

	  /* Force Firefox to handle ready state 4 for synchronous requests */
	  if (!this.options.asynchronous && this.transport.overrideMimeType)
		this.onStateChange();

	}
	catch (e) {
	  this.dispatchException(e);
	}
  },

  onStateChange: function() {
	var readyState = this.transport.readyState;
	if (readyState > 1 && !((readyState == 4) && this._complete))
	  this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
	var headers = {
	  'X-Requested-With': 'XMLHttpRequest',
	  'X-Prototype-Version': Prototype.Version,
	  'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
	};

	if (this.method == 'post') {
	  headers['Content-type'] = this.options.contentType +
		(this.options.encoding ? '; charset=' + this.options.encoding : '');

	  /* Force "Connection: close" for older Mozilla browsers to work
	   * around a bug where XMLHttpRequest sends an incorrect
	   * Content-length header. See Mozilla Bugzilla #246651.
	   */
	  if (this.transport.overrideMimeType &&
		  (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
			headers['Connection'] = 'close';
	}

	if (typeof this.options.requestHeaders == 'object') {
	  var extras = this.options.requestHeaders;

	  if (Object.isFunction(extras.push))
		for (var i = 0, length = extras.length; i < length; i += 2)
		  headers[extras[i]] = extras[i+1];
	  else
		$H(extras).each(function(pair) { headers[pair.key] = pair.value });
	}

	for (var name in headers)
	  this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
	var status = this.getStatus();
	return !status || (status >= 200 && status < 300) || status == 304;
  },

  getStatus: function() {
	try {
	  if (this.transport.status === 1223) return 204;
	  return this.transport.status || 0;
	} catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
	var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

	if (state == 'Complete') {
	  try {
		this._complete = true;
		(this.options['on' + response.status]
		 || this.options['on' + (this.success() ? 'Success' : 'Failure')]
		 || Prototype.emptyFunction)(response, response.headerJSON);
	  } catch (e) {
		this.dispatchException(e);
	  }

	  var contentType = response.getHeader('Content-type');
	  if (this.options.evalJS == 'force'
		  || (this.options.evalJS && this.isSameOrigin() && contentType
		  && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
		this.evalResponse();
	}

	try {
	  (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
	  Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
	} catch (e) {
	  this.dispatchException(e);
	}

	if (state == 'Complete') {
	  this.transport.onreadystatechange = Prototype.emptyFunction;
	}
  },

  isSameOrigin: function() {
	var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
	return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
	  protocol: location.protocol,
	  domain: document.domain,
	  port: location.port ? ':' + location.port : ''
	}));
  },

  getHeader: function(name) {
	try {
	  return this.transport.getResponseHeader(name) || null;
	} catch (e) { return null; }
  },

  evalResponse: function() {
	try {
	  return eval((this.transport.responseText || '').unfilterJSON());
	} catch (e) {
	  this.dispatchException(e);
	}
  },

  dispatchException: function(exception) {
	(this.options.onException || Prototype.emptyFunction)(this, exception);
	Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];








Ajax.Response = Class.create({
  initialize: function(request){
	this.request = request;
	var transport  = this.transport  = request.transport,
		readyState = this.readyState = transport.readyState;

	if ((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
	  this.status       = this.getStatus();
	  this.statusText   = this.getStatusText();
	  this.responseText = String.interpret(transport.responseText);
	  this.headerJSON   = this._getHeaderJSON();
	}

	if (readyState == 4) {
	  var xml = transport.responseXML;
	  this.responseXML  = Object.isUndefined(xml) ? null : xml;
	  this.responseJSON = this._getResponseJSON();
	}
  },

  status:      0,

  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
	try {
	  return this.transport.statusText || '';
	} catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
	try {
	  return this.getAllResponseHeaders();
	} catch (e) { return null }
  },

  getResponseHeader: function(name) {
	return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
	return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
	var json = this.getHeader('X-JSON');
	if (!json) return null;
	json = decodeURIComponent(escape(json));
	try {
	  return json.evalJSON(this.request.options.sanitizeJSON ||
		!this.request.isSameOrigin());
	} catch (e) {
	  this.request.dispatchException(e);
	}
  },

  _getResponseJSON: function() {
	var options = this.request.options;
	if (!options.evalJSON || (options.evalJSON != 'force' &&
	  !(this.getHeader('Content-type') || '').include('application/json')) ||
		this.responseText.blank())
		  return null;
	try {
	  return this.responseText.evalJSON(options.sanitizeJSON ||
		!this.request.isSameOrigin());
	} catch (e) {
	  this.request.dispatchException(e);
	}
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
	this.container = {
	  success: (container.success || container),
	  failure: (container.failure || (container.success ? null : container))
	};

	options = Object.clone(options);
	var onComplete = options.onComplete;
	options.onComplete = (function(response, json) {
	  this.updateContent(response.responseText);
	  if (Object.isFunction(onComplete)) onComplete(response, json);
	}).bind(this);

	$super(url, options);
  },

  updateContent: function(responseText) {
	var receiver = this.container[this.success() ? 'success' : 'failure'],
		options = this.options;

	if (!options.evalScripts) responseText = responseText.stripScripts();

	if (receiver = $(receiver)) {
	  if (options.insertion) {
		if (Object.isString(options.insertion)) {
		  var insertion = { }; insertion[options.insertion] = responseText;
		  receiver.insert(insertion);
		}
		else options.insertion(receiver, responseText);
	  }
	  else receiver.update(responseText);
	}
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
	$super(options);
	this.onComplete = this.options.onComplete;

	this.frequency = (this.options.frequency || 2);
	this.decay = (this.options.decay || 1);

	this.updater = { };
	this.container = container;
	this.url = url;

	this.start();
  },

  start: function() {
	this.options.onComplete = this.updateComplete.bind(this);
	this.onTimerEvent();
  },

  stop: function() {
	this.updater.options.onComplete = undefined;
	clearTimeout(this.timer);
	(this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
	if (this.options.decay) {
	  this.decay = (response.responseText == this.lastText ?
		this.decay * this.options.decay : 1);

	  this.lastText = response.responseText;
	}
	this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
	this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});


function $(element) {
  if (arguments.length > 1) {
	for (var i = 0, elements = [], length = arguments.length; i < length; i++)
	  elements.push($(arguments[i]));
	return elements;
  }
  if (Object.isString(element))
	element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
	var results = [];
	var query = document.evaluate(expression, $(parentElement) || document,
	  null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
	for (var i = 0, length = query.snapshotLength; i < length; i++)
	  results.push(Element.extend(query.snapshotItem(i)));
	return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  Object.extend(Node, {
	ELEMENT_NODE: 1,
	ATTRIBUTE_NODE: 2,
	TEXT_NODE: 3,
	CDATA_SECTION_NODE: 4,
	ENTITY_REFERENCE_NODE: 5,
	ENTITY_NODE: 6,
	PROCESSING_INSTRUCTION_NODE: 7,
	COMMENT_NODE: 8,
	DOCUMENT_NODE: 9,
	DOCUMENT_TYPE_NODE: 10,
	DOCUMENT_FRAGMENT_NODE: 11,
	NOTATION_NODE: 12
  });
}



(function(global) {
  function shouldUseCache(tagName, attributes) {
	if (tagName === 'select') return false;
	if ('type' in attributes) return false;
	return true;
  }

  var HAS_EXTENDED_CREATE_ELEMENT_SYNTAX = (function(){
	try {
	  var el = document.createElement('<input name="x">');
	  return el.tagName.toLowerCase() === 'input' && el.name === 'x';
	}
	catch(err) {
	  return false;
	}
  })();

  var element = global.Element;

  global.Element = function(tagName, attributes) {
	attributes = attributes || { };
	tagName = tagName.toLowerCase();
	var cache = Element.cache;

	if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {
	  tagName = '<' + tagName + ' name="' + attributes.name + '">';
	  delete attributes.name;
	  return Element.writeAttribute(document.createElement(tagName), attributes);
	}

	if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));

	var node = shouldUseCache(tagName, attributes) ?
	 cache[tagName].cloneNode(false) : document.createElement(tagName);

	return Element.writeAttribute(node, attributes);
  };

  Object.extend(global.Element, element || { });
  if (element) global.Element.prototype = element.prototype;

})(this);

Element.idCounter = 1;
Element.cache = { };

Element._purgeElement = function(element) {
  var uid = element._prototypeUID;
  if (uid) {
	Element.stopObserving(element);
	element._prototypeUID = void 0;
	delete Element.Storage[uid];
  }
}

Element.Methods = {
  visible: function(element) {
	return $(element).style.display != 'none';
  },

  toggle: function(element) {
	element = $(element);
	Element[Element.visible(element) ? 'hide' : 'show'](element);
	return element;
  },

  hide: function(element) {
	element = $(element);
	element.style.display = 'none';
	return element;
  },

  show: function(element) {
	element = $(element);
	element.style.display = '';
	return element;
  },

  remove: function(element) {
	element = $(element);
	element.parentNode.removeChild(element);
	return element;
  },

  update: (function(){

	var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
	  var el = document.createElement("select"),
		  isBuggy = true;
	  el.innerHTML = "<option value=\"test\">test</option>";
	  if (el.options && el.options[0]) {
		isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
	  }
	  el = null;
	  return isBuggy;
	})();

	var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
	  try {
		var el = document.createElement("table");
		if (el && el.tBodies) {
		  el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
		  var isBuggy = typeof el.tBodies[0] == "undefined";
		  el = null;
		  return isBuggy;
		}
	  } catch (e) {
		return true;
	  }
	})();

	var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
	  try {
		var el = document.createElement('div');
		el.innerHTML = "<link>";
		var isBuggy = (el.childNodes.length === 0);
		el = null;
		return isBuggy;
	  } catch(e) {
		return true;
	  }
	})();

	var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
	 TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;

	var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
	  var s = document.createElement("script"),
		  isBuggy = false;
	  try {
		s.appendChild(document.createTextNode(""));
		isBuggy = !s.firstChild ||
		  s.firstChild && s.firstChild.nodeType !== 3;
	  } catch (e) {
		isBuggy = true;
	  }
	  s = null;
	  return isBuggy;
	})();


	function update(element, content) {
	  element = $(element);
	  var purgeElement = Element._purgeElement;

	  var descendants = element.getElementsByTagName('*'),
	   i = descendants.length;
	  while (i--) purgeElement(descendants[i]);

	  if (content && content.toElement)
		content = content.toElement();

	  if (Object.isElement(content))
		return element.update().insert(content);

	  content = Object.toHTML(content);

	  var tagName = element.tagName.toUpperCase();

	  if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
		element.text = content;
		return element;
	  }

	  if (ANY_INNERHTML_BUGGY) {
		if (tagName in Element._insertionTranslations.tags) {
		  while (element.firstChild) {
			element.removeChild(element.firstChild);
		  }
		  Element._getContentFromAnonymousElement(tagName, content.stripScripts())
			.each(function(node) {
			  element.appendChild(node)
			});
		} else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
		  while (element.firstChild) {
			element.removeChild(element.firstChild);
		  }
		  var nodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts(), true);
		  nodes.each(function(node) { element.appendChild(node) });
		}
		else {
		  element.innerHTML = content.stripScripts();
		}
	  }
	  else {
		element.innerHTML = content.stripScripts();
	  }

	  content.evalScripts.bind(content).defer();
	  return element;
	}

	return update;
  })(),

  replace: function(element, content) {
	element = $(element);
	if (content && content.toElement) content = content.toElement();
	else if (!Object.isElement(content)) {
	  content = Object.toHTML(content);
	  var range = element.ownerDocument.createRange();
	  range.selectNode(element);
	  content.evalScripts.bind(content).defer();
	  content = range.createContextualFragment(content.stripScripts());
	}
	element.parentNode.replaceChild(content, element);
	return element;
  },

  insert: function(element, insertions) {
	element = $(element);

	if (Object.isString(insertions) || Object.isNumber(insertions) ||
		Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
		  insertions = {bottom:insertions};

	var content, insert, tagName, childNodes;

	for (var position in insertions) {
	  content  = insertions[position];
	  position = position.toLowerCase();
	  insert = Element._insertionTranslations[position];

	  if (content && content.toElement) content = content.toElement();
	  if (Object.isElement(content)) {
		insert(element, content);
		continue;
	  }

	  content = Object.toHTML(content);

	  tagName = ((position == 'before' || position == 'after')
		? element.parentNode : element).tagName.toUpperCase();

	  childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

	  if (position == 'top' || position == 'after') childNodes.reverse();
	  childNodes.each(insert.curry(element));

	  content.evalScripts.bind(content).defer();
	}

	return element;
  },

  wrap: function(element, wrapper, attributes) {
	element = $(element);
	if (Object.isElement(wrapper))
	  $(wrapper).writeAttribute(attributes || { });
	else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
	else wrapper = new Element('div', wrapper);
	if (element.parentNode)
	  element.parentNode.replaceChild(wrapper, element);
	wrapper.appendChild(element);
	return wrapper;
  },

  inspect: function(element) {
	element = $(element);
	var result = '<' + element.tagName.toLowerCase();
	$H({'id': 'id', 'className': 'class'}).each(function(pair) {
	  var property = pair.first(),
		  attribute = pair.last(),
		  value = (element[property] || '').toString();
	  if (value) result += ' ' + attribute + '=' + value.inspect(true);
	});
	return result + '>';
  },

  recursivelyCollect: function(element, property, maximumLength) {
	element = $(element);
	maximumLength = maximumLength || -1;
	var elements = [];

	while (element = element[property]) {
	  if (element.nodeType == 1)
		elements.push(Element.extend(element));
	  if (elements.length == maximumLength)
		break;
	}

	return elements;
  },

  ancestors: function(element) {
	return Element.recursivelyCollect(element, 'parentNode');
  },

  descendants: function(element) {
	return Element.select(element, "*");
  },

  firstDescendant: function(element) {
	element = $(element).firstChild;
	while (element && element.nodeType != 1) element = element.nextSibling;
	return $(element);
  },

  immediateDescendants: function(element) {
	var results = [], child = $(element).firstChild;
	while (child) {
	  if (child.nodeType === 1) {
		results.push(Element.extend(child));
	  }
	  child = child.nextSibling;
	}
	return results;
  },

  previousSiblings: function(element, maximumLength) {
	return Element.recursivelyCollect(element, 'previousSibling');
  },

  nextSiblings: function(element) {
	return Element.recursivelyCollect(element, 'nextSibling');
  },

  siblings: function(element) {
	element = $(element);
	return Element.previousSiblings(element).reverse()
	  .concat(Element.nextSiblings(element));
  },

  match: function(element, selector) {
	element = $(element);
	if (Object.isString(selector))
	  return Prototype.Selector.match(element, selector);
	return selector.match(element);
  },

  up: function(element, expression, index) {
	element = $(element);
	if (arguments.length == 1) return $(element.parentNode);
	var ancestors = Element.ancestors(element);
	return Object.isNumber(expression) ? ancestors[expression] :
	  Prototype.Selector.find(ancestors, expression, index);
  },

  down: function(element, expression, index) {
	element = $(element);
	if (arguments.length == 1) return Element.firstDescendant(element);
	return Object.isNumber(expression) ? Element.descendants(element)[expression] :
	  Element.select(element, expression)[index || 0];
  },

  previous: function(element, expression, index) {
	element = $(element);
	if (Object.isNumber(expression)) index = expression, expression = false;
	if (!Object.isNumber(index)) index = 0;

	if (expression) {
	  return Prototype.Selector.find(element.previousSiblings(), expression, index);
	} else {
	  return element.recursivelyCollect("previousSibling", index + 1)[index];
	}
  },

  next: function(element, expression, index) {
	element = $(element);
	if (Object.isNumber(expression)) index = expression, expression = false;
	if (!Object.isNumber(index)) index = 0;

	if (expression) {
	  return Prototype.Selector.find(element.nextSiblings(), expression, index);
	} else {
	  var maximumLength = Object.isNumber(index) ? index + 1 : 1;
	  return element.recursivelyCollect("nextSibling", index + 1)[index];
	}
  },


  select: function(element) {
	element = $(element);
	var expressions = Array.prototype.slice.call(arguments, 1).join(', ');
	return Prototype.Selector.select(expressions, element);
  },

  adjacent: function(element) {
	element = $(element);
	var expressions = Array.prototype.slice.call(arguments, 1).join(', ');
	return Prototype.Selector.select(expressions, element.parentNode).without(element);
  },

  identify: function(element) {
	element = $(element);
	var id = Element.readAttribute(element, 'id');
	if (id) return id;
	do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));
	Element.writeAttribute(element, 'id', id);
	return id;
  },

  readAttribute: function(element, name) {
	element = $(element);
	if (Prototype.Browser.IE) {
	  var t = Element._attributeTranslations.read;
	  if (t.values[name]) return t.values[name](element, name);
	  if (t.names[name]) name = t.names[name];
	  if (name.include(':')) {
		return (!element.attributes || !element.attributes[name]) ? null :
		 element.attributes[name].value;
	  }
	}
	return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
	element = $(element);
	var attributes = { }, t = Element._attributeTranslations.write;

	if (typeof name == 'object') attributes = name;
	else attributes[name] = Object.isUndefined(value) ? true : value;

	for (var attr in attributes) {
	  name = t.names[attr] || attr;
	  value = attributes[attr];
	  if (t.values[attr]) name = t.values[attr](element, value);
	  if (value === false || value === null)
		element.removeAttribute(name);
	  else if (value === true)
		element.setAttribute(name, name);
	  else element.setAttribute(name, value);
	}
	return element;
  },

  getHeight: function(element) {
	return Element.getDimensions(element).height;
  },

  getWidth: function(element) {
	return Element.getDimensions(element).width;
  },

  classNames: function(element) {
	return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
	if (!(element = $(element))) return;
	var elementClassName = element.className;
	return (elementClassName.length > 0 && (elementClassName == className ||
	  new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
	if (!(element = $(element))) return;
	if (!Element.hasClassName(element, className))
	  element.className += (element.className ? ' ' : '') + className;
	return element;
  },

  removeClassName: function(element, className) {
	if (!(element = $(element))) return;
	element.className = element.className.replace(
	  new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
	return element;
  },

  toggleClassName: function(element, className) {
	if (!(element = $(element))) return;
	return Element[Element.hasClassName(element, className) ?
	  'removeClassName' : 'addClassName'](element, className);
  },

  cleanWhitespace: function(element) {
	element = $(element);
	var node = element.firstChild;
	while (node) {
	  var nextNode = node.nextSibling;
	  if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
		element.removeChild(node);
	  node = nextNode;
	}
	return element;
  },

  empty: function(element) {
	return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
	element = $(element), ancestor = $(ancestor);

	if (element.compareDocumentPosition)
	  return (element.compareDocumentPosition(ancestor) & 8) === 8;

	if (ancestor.contains)
	  return ancestor.contains(element) && ancestor !== element;

	while (element = element.parentNode)
	  if (element == ancestor) return true;

	return false;
  },

  scrollTo: function(element) {
	element = $(element);
	var pos = Element.cumulativeOffset(element);
	window.scrollTo(pos[0], pos[1]);
	return element;
  },

  getStyle: function(element, style) {
	element = $(element);
	style = style == 'float' ? 'cssFloat' : style.camelize();
	var value = element.style[style];
	if (!value || value == 'auto') {
	  var css = document.defaultView.getComputedStyle(element, null);
	  value = css ? css[style] : null;
	}
	if (style == 'opacity') return value ? parseFloat(value) : 1.0;
	return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
	return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
	element = $(element);
	var elementStyle = element.style, match;
	if (Object.isString(styles)) {
	  element.style.cssText += ';' + styles;
	  return styles.include('opacity') ?
		element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
	}
	for (var property in styles)
	  if (property == 'opacity') element.setOpacity(styles[property]);
	  else
		elementStyle[(property == 'float' || property == 'cssFloat') ?
		  (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
			property] = styles[property];

	return element;
  },

  setOpacity: function(element, value) {
	element = $(element);
	element.style.opacity = (value == 1 || value === '') ? '' :
	  (value < 0.00001) ? 0 : value;
	return element;
  },

  makePositioned: function(element) {
	element = $(element);
	var pos = Element.getStyle(element, 'position');
	if (pos == 'static' || !pos) {
	  element._madePositioned = true;
	  element.style.position = 'relative';
	  if (Prototype.Browser.Opera) {
		element.style.top = 0;
		element.style.left = 0;
	  }
	}
	return element;
  },

  undoPositioned: function(element) {
	element = $(element);
	if (element._madePositioned) {
	  element._madePositioned = undefined;
	  element.style.position =
		element.style.top =
		element.style.left =
		element.style.bottom =
		element.style.right = '';
	}
	return element;
  },

  makeClipping: function(element) {
	element = $(element);
	if (element._overflow) return element;
	element._overflow = Element.getStyle(element, 'overflow') || 'auto';
	if (element._overflow !== 'hidden')
	  element.style.overflow = 'hidden';
	return element;
  },

  undoClipping: function(element) {
	element = $(element);
	if (!element._overflow) return element;
	element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
	element._overflow = null;
	return element;
  },

  clonePosition: function(element, source) {
	var options = Object.extend({
	  setLeft:    true,
	  setTop:     true,
	  setWidth:   true,
	  setHeight:  true,
	  offsetTop:  0,
	  offsetLeft: 0
	}, arguments[2] || { });

	source = $(source);
	var p = Element.viewportOffset(source), delta = [0, 0], parent = null;

	element = $(element);

	if (Element.getStyle(element, 'position') == 'absolute') {
	  parent = Element.getOffsetParent(element);
	  delta = Element.viewportOffset(parent);
	}

	if (parent == document.body) {
	  delta[0] -= document.body.offsetLeft;
	  delta[1] -= document.body.offsetTop;
	}

	if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
	if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
	if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
	if (options.setHeight) element.style.height = source.offsetHeight + 'px';
	return element;
  }
};

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,

  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
	names: {
	  className: 'class',
	  htmlFor:   'for'
	},
	values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
	function(proceed, element, style) {
	  switch (style) {
		case 'height': case 'width':
		  if (!Element.visible(element)) return null;

		  var dim = parseInt(proceed(element, style), 10);

		  if (dim !== element['offset' + style.capitalize()])
			return dim + 'px';

		  var properties;
		  if (style === 'height') {
			properties = ['border-top-width', 'padding-top',
			 'padding-bottom', 'border-bottom-width'];
		  }
		  else {
			properties = ['border-left-width', 'padding-left',
			 'padding-right', 'border-right-width'];
		  }
		  return properties.inject(dim, function(memo, property) {
			var val = proceed(element, property);
			return val === null ? memo : memo - parseInt(val, 10);
		  }) + 'px';
		default: return proceed(element, style);
	  }
	}
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
	function(proceed, element, attribute) {
	  if (attribute === 'title') return element.title;
	  return proceed(element, attribute);
	}
  );
}

else if (Prototype.Browser.IE) {
  Element.Methods.getStyle = function(element, style) {
	element = $(element);
	style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
	var value = element.style[style];
	if (!value && element.currentStyle) value = element.currentStyle[style];

	if (style == 'opacity') {
	  if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
		if (value[1]) return parseFloat(value[1]) / 100;
	  return 1.0;
	}

	if (value == 'auto') {
	  if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
		return element['offset' + style.capitalize()] + 'px';
	  return null;
	}
	return value;
  };

  Element.Methods.setOpacity = function(element, value) {
	function stripAlpha(filter){
	  return filter.replace(/alpha\([^\)]*\)/gi,'');
	}
	element = $(element);
	var currentStyle = element.currentStyle;
	if ((currentStyle && !currentStyle.hasLayout) ||
	  (!currentStyle && element.style.zoom == 'normal'))
		element.style.zoom = 1;

	var filter = element.getStyle('filter'), style = element.style;
	if (value == 1 || value === '') {
	  (filter = stripAlpha(filter)) ?
		style.filter = filter : style.removeAttribute('filter');
	  return element;
	} else if (value < 0.00001) value = 0;
	style.filter = stripAlpha(filter) +
	  'alpha(opacity=' + (value * 100) + ')';
	return element;
  };

  Element._attributeTranslations = (function(){

	var classProp = 'className',
		forProp = 'for',
		el = document.createElement('div');

	el.setAttribute(classProp, 'x');

	if (el.className !== 'x') {
	  el.setAttribute('class', 'x');
	  if (el.className === 'x') {
		classProp = 'class';
	  }
	}
	el = null;

	el = document.createElement('label');
	el.setAttribute(forProp, 'x');
	if (el.htmlFor !== 'x') {
	  el.setAttribute('htmlFor', 'x');
	  if (el.htmlFor === 'x') {
		forProp = 'htmlFor';
	  }
	}
	el = null;

	return {
	  read: {
		names: {
		  'class':      classProp,
		  'className':  classProp,
		  'for':        forProp,
		  'htmlFor':    forProp
		},
		values: {
		  _getAttr: function(element, attribute) {
			return element.getAttribute(attribute);
		  },
		  _getAttr2: function(element, attribute) {
			return element.getAttribute(attribute, 2);
		  },
		  _getAttrNode: function(element, attribute) {
			var node = element.getAttributeNode(attribute);
			return node ? node.value : "";
		  },
		  _getEv: (function(){

			var el = document.createElement('div'), f;
			el.onclick = Prototype.emptyFunction;
			var value = el.getAttribute('onclick');

			if (String(value).indexOf('{') > -1) {
			  f = function(element, attribute) {
				attribute = element.getAttribute(attribute);
				if (!attribute) return null;
				attribute = attribute.toString();
				attribute = attribute.split('{')[1];
				attribute = attribute.split('}')[0];
				return attribute.strip();
			  };
			}
			else if (value === '') {
			  f = function(element, attribute) {
				attribute = element.getAttribute(attribute);
				if (!attribute) return null;
				return attribute.strip();
			  };
			}
			el = null;
			return f;
		  })(),
		  _flag: function(element, attribute) {
			return $(element).hasAttribute(attribute) ? attribute : null;
		  },
		  style: function(element) {
			return element.style.cssText.toLowerCase();
		  },
		  title: function(element) {
			return element.title;
		  }
		}
	  }
	}
  })();

  Element._attributeTranslations.write = {
	names: Object.extend({
	  cellpadding: 'cellPadding',
	  cellspacing: 'cellSpacing'
	}, Element._attributeTranslations.read.names),
	values: {
	  checked: function(element, value) {
		element.checked = !!value;
	  },

	  style: function(element, value) {
		element.style.cssText = value ? value : '';
	  }
	}
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
	  'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
	Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
	Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
	Object.extend(v, {
	  href:        v._getAttr2,
	  src:         v._getAttr2,
	  type:        v._getAttr,
	  action:      v._getAttrNode,
	  disabled:    v._flag,
	  checked:     v._flag,
	  readonly:    v._flag,
	  multiple:    v._flag,
	  onload:      v._getEv,
	  onunload:    v._getEv,
	  onclick:     v._getEv,
	  ondblclick:  v._getEv,
	  onmousedown: v._getEv,
	  onmouseup:   v._getEv,
	  onmouseover: v._getEv,
	  onmousemove: v._getEv,
	  onmouseout:  v._getEv,
	  onfocus:     v._getEv,
	  onblur:      v._getEv,
	  onkeypress:  v._getEv,
	  onkeydown:   v._getEv,
	  onkeyup:     v._getEv,
	  onsubmit:    v._getEv,
	  onreset:     v._getEv,
	  onselect:    v._getEv,
	  onchange:    v._getEv
	});
  })(Element._attributeTranslations.read.values);

  if (Prototype.BrowserFeatures.ElementExtensions) {
	(function() {
	  function _descendants(element) {
		var nodes = element.getElementsByTagName('*'), results = [];
		for (var i = 0, node; node = nodes[i]; i++)
		  if (node.tagName !== "!") // Filter out comment nodes.
			results.push(node);
		return results;
	  }

	  Element.Methods.down = function(element, expression, index) {
		element = $(element);
		if (arguments.length == 1) return element.firstDescendant();
		return Object.isNumber(expression) ? _descendants(element)[expression] :
		  Element.select(element, expression)[index || 0];
	  }
	})();
  }

}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
	element = $(element);
	element.style.opacity = (value == 1) ? 0.999999 :
	  (value === '') ? '' : (value < 0.00001) ? 0 : value;
	return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
	element = $(element);
	element.style.opacity = (value == 1 || value === '') ? '' :
	  (value < 0.00001) ? 0 : value;

	if (value == 1)
	  if (element.tagName.toUpperCase() == 'IMG' && element.width) {
		element.width++; element.width--;
	  } else try {
		var n = document.createTextNode(' ');
		element.appendChild(n);
		element.removeChild(n);
	  } catch (e) { }

	return element;
  };
}

if ('outerHTML' in document.documentElement) {
  Element.Methods.replace = function(element, content) {
	element = $(element);

	if (content && content.toElement) content = content.toElement();
	if (Object.isElement(content)) {
	  element.parentNode.replaceChild(content, element);
	  return element;
	}

	content = Object.toHTML(content);
	var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

	if (Element._insertionTranslations.tags[tagName]) {
	  var nextSibling = element.next(),
		  fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
	  parent.removeChild(element);
	  if (nextSibling)
		fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
	  else
		fragments.each(function(node) { parent.appendChild(node) });
	}
	else element.outerHTML = content.stripScripts();

	content.evalScripts.bind(content).defer();
	return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html, force) {
  var div = new Element('div'),
	  t = Element._insertionTranslations.tags[tagName];

  var workaround = false;
  if (t) workaround = true;
  else if (force) {
	workaround = true;
	t = ['', '', 0];
  }

  if (workaround) {
	div.innerHTML = '&nbsp;' + t[0] + html + t[1];
	div.removeChild(div.firstChild);
	for (var i = t[2]; i--; ) {
	  div = div.firstChild;
	}
  }
  else {
	div.innerHTML = html;
  }
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
	element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
	element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
	element.appendChild(node);
  },
  after: function(element, node) {
	element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
	TABLE:  ['<table>',                '</table>',                   1],
	TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
	TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
	TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
	SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  var tags = Element._insertionTranslations.tags;
  Object.extend(tags, {
	THEAD: tags.TBODY,
	TFOOT: tags.TBODY,
	TH:    tags.TD
  });
})();

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
	attribute = Element._attributeTranslations.has[attribute] || attribute;
	var node = $(element).getAttributeNode(attribute);
	return !!(node && node.specified);
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

(function(div) {

  if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
	window.HTMLElement = { };
	window.HTMLElement.prototype = div['__proto__'];
	Prototype.BrowserFeatures.ElementExtensions = true;
  }

  div = null;

})(document.createElement('div'));

Element.extend = (function() {

  function checkDeficiency(tagName) {
	if (typeof window.Element != 'undefined') {
	  var proto = window.Element.prototype;
	  if (proto) {
		var id = '_' + (Math.random()+'').slice(2),
			el = document.createElement(tagName);
		proto[id] = 'x';
		var isBuggy = (el[id] !== 'x');
		delete proto[id];
		el = null;
		return isBuggy;
	  }
	}
	return false;
  }

  function extendElementWith(element, methods) {
	for (var property in methods) {
	  var value = methods[property];
	  if (Object.isFunction(value) && !(property in element))
		element[property] = value.methodize();
	}
  }

  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');

  if (Prototype.BrowserFeatures.SpecificElementExtensions) {
	if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {
	  return function(element) {
		if (element && typeof element._extendedByPrototype == 'undefined') {
		  var t = element.tagName;
		  if (t && (/^(?:object|applet|embed)$/i.test(t))) {
			extendElementWith(element, Element.Methods);
			extendElementWith(element, Element.Methods.Simulated);
			extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
		  }
		}
		return element;
	  }
	}
	return Prototype.K;
  }

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
	if (!element || typeof element._extendedByPrototype != 'undefined' ||
		element.nodeType != 1 || element == window) return element;

	var methods = Object.clone(Methods),
		tagName = element.tagName.toUpperCase();

	if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

	extendElementWith(element, methods);

	element._extendedByPrototype = Prototype.emptyFunction;
	return element;

  }, {
	refresh: function() {
	  if (!Prototype.BrowserFeatures.ElementExtensions) {
		Object.extend(Methods, Element.Methods);
		Object.extend(Methods, Element.Methods.Simulated);
	  }
	}
  });

  extend.refresh();
  return extend;
})();

if (document.documentElement.hasAttribute) {
  Element.hasAttribute = function(element, attribute) {
	return element.hasAttribute(attribute);
  };
}
else {
  Element.hasAttribute = Element.Methods.Simulated.hasAttribute;
}

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
	Object.extend(Form, Form.Methods);
	Object.extend(Form.Element, Form.Element.Methods);
	Object.extend(Element.Methods.ByTag, {
	  "FORM":     Object.clone(Form.Methods),
	  "INPUT":    Object.clone(Form.Element.Methods),
	  "SELECT":   Object.clone(Form.Element.Methods),
	  "TEXTAREA": Object.clone(Form.Element.Methods),
	  "BUTTON":   Object.clone(Form.Element.Methods)
	});
  }

  if (arguments.length == 2) {
	var tagName = methods;
	methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
	if (Object.isArray(tagName)) tagName.each(extend);
	else extend(tagName);
  }

  function extend(tagName) {
	tagName = tagName.toUpperCase();
	if (!Element.Methods.ByTag[tagName])
	  Element.Methods.ByTag[tagName] = { };
	Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
	onlyIfAbsent = onlyIfAbsent || false;
	for (var property in methods) {
	  var value = methods[property];
	  if (!Object.isFunction(value)) continue;
	  if (!onlyIfAbsent || !(property in destination))
		destination[property] = value.methodize();
	}
  }

  function findDOMClass(tagName) {
	var klass;
	var trans = {
	  "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
	  "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
	  "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
	  "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
	  "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
	  "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
	  "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
	  "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
	  "FrameSet", "IFRAME": "IFrame"
	};
	if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
	if (window[klass]) return window[klass];
	klass = 'HTML' + tagName + 'Element';
	if (window[klass]) return window[klass];
	klass = 'HTML' + tagName.capitalize() + 'Element';
	if (window[klass]) return window[klass];

	var element = document.createElement(tagName),
		proto = element['__proto__'] || element.constructor.prototype;

	element = null;
	return proto;
  }

  var elementPrototype = window.HTMLElement ? HTMLElement.prototype :
   Element.prototype;

  if (F.ElementExtensions) {
	copy(Element.Methods, elementPrototype);
	copy(Element.Methods.Simulated, elementPrototype, true);
  }

  if (F.SpecificElementExtensions) {
	for (var tag in Element.Methods.ByTag) {
	  var klass = findDOMClass(tag);
	  if (Object.isUndefined(klass)) continue;
	  copy(T[tag], klass.prototype);
	}
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};


document.viewport = {

  getDimensions: function() {
	return { width: this.getWidth(), height: this.getHeight() };
  },

  getScrollOffsets: function() {
	return Element._returnOffset(
	  window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
	  window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);
  }
};

(function(viewport) {
  var B = Prototype.Browser, doc = document, element, property = {};

  function getRootElement() {
	if (B.WebKit && !doc.evaluate)
	  return document;

	if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
	  return document.body;

	return document.documentElement;
  }

  function define(D) {
	if (!element) element = getRootElement();

	property[D] = 'client' + D;

	viewport['get' + D] = function() { return element[property[D]] };
	return viewport['get' + D]();
  }

  viewport.getWidth  = define.curry('Width');

  viewport.getHeight = define.curry('Height');
})(document.viewport);


Element.Storage = {
  UID: 1
};

Element.addMethods({
  getStorage: function(element) {
	if (!(element = $(element))) return;

	var uid;
	if (element === window) {
	  uid = 0;
	} else {
	  if (typeof element._prototypeUID === "undefined")
		element._prototypeUID = Element.Storage.UID++;
	  uid = element._prototypeUID;
	}

	if (!Element.Storage[uid])
	  Element.Storage[uid] = $H();

	return Element.Storage[uid];
  },

  store: function(element, key, value) {
	if (!(element = $(element))) return;

	if (arguments.length === 2) {
	  Element.getStorage(element).update(key);
	} else {
	  Element.getStorage(element).set(key, value);
	}

	return element;
  },

  retrieve: function(element, key, defaultValue) {
	if (!(element = $(element))) return;
	var hash = Element.getStorage(element), value = hash.get(key);

	if (Object.isUndefined(value)) {
	  hash.set(key, defaultValue);
	  value = defaultValue;
	}

	return value;
  },

  clone: function(element, deep) {
	if (!(element = $(element))) return;
	var clone = element.cloneNode(deep);
	clone._prototypeUID = void 0;
	if (deep) {
	  var descendants = Element.select(clone, '*'),
		  i = descendants.length;
	  while (i--) {
		descendants[i]._prototypeUID = void 0;
	  }
	}
	return Element.extend(clone);
  },

  purge: function(element) {
	if (!(element = $(element))) return;
	var purgeElement = Element._purgeElement;

	purgeElement(element);

	var descendants = element.getElementsByTagName('*'),
	 i = descendants.length;

	while (i--) purgeElement(descendants[i]);

	return null;
  }
});

(function() {

  function toDecimal(pctString) {
	var match = pctString.match(/^(\d+)%?$/i);
	if (!match) return null;
	return (Number(match[1]) / 100);
  }

  function getPixelValue(value, property, context) {
	var element = null;
	if (Object.isElement(value)) {
	  element = value;
	  value = element.getStyle(property);
	}

	if (value === null) {
	  return null;
	}

	if ((/^(?:-)?\d+(\.\d+)?(px)?$/i).test(value)) {
	  return window.parseFloat(value);
	}

	var isPercentage = value.include('%'), isViewport = (context === document.viewport);

	if (/\d/.test(value) && element && element.runtimeStyle && !(isPercentage && isViewport)) {
	  var style = element.style.left, rStyle = element.runtimeStyle.left;
	  element.runtimeStyle.left = element.currentStyle.left;
	  element.style.left = value || 0;
	  value = element.style.pixelLeft;
	  element.style.left = style;
	  element.runtimeStyle.left = rStyle;

	  return value;
	}

	if (element && isPercentage) {
	  context = context || element.parentNode;
	  var decimal = toDecimal(value);
	  var whole = null;
	  var position = element.getStyle('position');

	  var isHorizontal = property.include('left') || property.include('right') ||
	   property.include('width');

	  var isVertical =  property.include('top') || property.include('bottom') ||
		property.include('height');

	  if (context === document.viewport) {
		if (isHorizontal) {
		  whole = document.viewport.getWidth();
		} else if (isVertical) {
		  whole = document.viewport.getHeight();
		}
	  } else {
		if (isHorizontal) {
		  whole = $(context).measure('width');
		} else if (isVertical) {
		  whole = $(context).measure('height');
		}
	  }

	  return (whole === null) ? 0 : whole * decimal;
	}

	return 0;
  }

  function toCSSPixels(number) {
	if (Object.isString(number) && number.endsWith('px')) {
	  return number;
	}
	return number + 'px';
  }

  function isDisplayed(element) {
	var originalElement = element;
	while (element && element.parentNode) {
	  var display = element.getStyle('display');
	  if (display === 'none') {
		return false;
	  }
	  element = $(element.parentNode);
	}
	return true;
  }

  var hasLayout = Prototype.K;
  if ('currentStyle' in document.documentElement) {
	hasLayout = function(element) {
	  if (!element.currentStyle.hasLayout) {
		element.style.zoom = 1;
	  }
	  return element;
	};
  }

  function cssNameFor(key) {
	if (key.include('border')) key = key + '-width';
	return key.camelize();
  }

  Element.Layout = Class.create(Hash, {
	initialize: function($super, element, preCompute) {
	  $super();
	  this.element = $(element);

	  Element.Layout.PROPERTIES.each( function(property) {
		this._set(property, null);
	  }, this);

	  if (preCompute) {
		this._preComputing = true;
		this._begin();
		Element.Layout.PROPERTIES.each( this._compute, this );
		this._end();
		this._preComputing = false;
	  }
	},

	_set: function(property, value) {
	  return Hash.prototype.set.call(this, property, value);
	},

	set: function(property, value) {
	  throw "Properties of Element.Layout are read-only.";
	},

	get: function($super, property) {
	  var value = $super(property);
	  return value === null ? this._compute(property) : value;
	},

	_begin: function() {
	  if (this._prepared) return;

	  var element = this.element;
	  if (isDisplayed(element)) {
		this._prepared = true;
		return;
	  }

	  var originalStyles = {
		position:   element.style.position   || '',
		width:      element.style.width      || '',
		visibility: element.style.visibility || '',
		display:    element.style.display    || ''
	  };

	  element.store('prototype_original_styles', originalStyles);

	  var position = element.getStyle('position'),
	   width = element.getStyle('width');

	  if (width === "0px" || width === null) {
		element.style.display = 'block';
		width = element.getStyle('width');
	  }

	  var context = (position === 'fixed') ? document.viewport :
	   element.parentNode;

	  element.setStyle({
		position:   'absolute',
		visibility: 'hidden',
		display:    'block'
	  });

	  var positionedWidth = element.getStyle('width');

	  var newWidth;
	  if (width && (positionedWidth === width)) {
		newWidth = getPixelValue(element, 'width', context);
	  } else if (position === 'absolute' || position === 'fixed') {
		newWidth = getPixelValue(element, 'width', context);
	  } else {
		var parent = element.parentNode, pLayout = $(parent).getLayout();

		newWidth = pLayout.get('width') -
		 this.get('margin-left') -
		 this.get('border-left') -
		 this.get('padding-left') -
		 this.get('padding-right') -
		 this.get('border-right') -
		 this.get('margin-right');
	  }

	  element.setStyle({ width: newWidth + 'px' });

	  this._prepared = true;
	},

	_end: function() {
	  var element = this.element;
	  var originalStyles = element.retrieve('prototype_original_styles');
	  element.store('prototype_original_styles', null);
	  element.setStyle(originalStyles);
	  this._prepared = false;
	},

	_compute: function(property) {
	  var COMPUTATIONS = Element.Layout.COMPUTATIONS;
	  if (!(property in COMPUTATIONS)) {
		throw "Property not found.";
	  }

	  return this._set(property, COMPUTATIONS[property].call(this, this.element));
	},

	toObject: function() {
	  var args = $A(arguments);
	  var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
	   args.join(' ').split(' ');
	  var obj = {};
	  keys.each( function(key) {
		if (!Element.Layout.PROPERTIES.include(key)) return;
		var value = this.get(key);
		if (value != null) obj[key] = value;
	  }, this);
	  return obj;
	},

	toHash: function() {
	  var obj = this.toObject.apply(this, arguments);
	  return new Hash(obj);
	},

	toCSS: function() {
	  var args = $A(arguments);
	  var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
	   args.join(' ').split(' ');
	  var css = {};

	  keys.each( function(key) {
		if (!Element.Layout.PROPERTIES.include(key)) return;
		if (Element.Layout.COMPOSITE_PROPERTIES.include(key)) return;

		var value = this.get(key);
		if (value != null) css[cssNameFor(key)] = value + 'px';
	  }, this);
	  return css;
	},

	inspect: function() {
	  return "#<Element.Layout>";
	}
  });

  Object.extend(Element.Layout, {
	PROPERTIES: $w('height width top left right bottom border-left border-right border-top border-bottom padding-left padding-right padding-top padding-bottom margin-top margin-bottom margin-left margin-right padding-box-width padding-box-height border-box-width border-box-height margin-box-width margin-box-height'),

	COMPOSITE_PROPERTIES: $w('padding-box-width padding-box-height margin-box-width margin-box-height border-box-width border-box-height'),

	COMPUTATIONS: {
	  'height': function(element) {
		if (!this._preComputing) this._begin();

		var bHeight = this.get('border-box-height');
		if (bHeight <= 0) {
		  if (!this._preComputing) this._end();
		  return 0;
		}

		var bTop = this.get('border-top'),
		 bBottom = this.get('border-bottom');

		var pTop = this.get('padding-top'),
		 pBottom = this.get('padding-bottom');

		if (!this._preComputing) this._end();

		return bHeight - bTop - bBottom - pTop - pBottom;
	  },

	  'width': function(element) {
		if (!this._preComputing) this._begin();

		var bWidth = this.get('border-box-width');
		if (bWidth <= 0) {
		  if (!this._preComputing) this._end();
		  return 0;
		}

		var bLeft = this.get('border-left'),
		 bRight = this.get('border-right');

		var pLeft = this.get('padding-left'),
		 pRight = this.get('padding-right');

		if (!this._preComputing) this._end();

		return bWidth - bLeft - bRight - pLeft - pRight;
	  },

	  'padding-box-height': function(element) {
		var height = this.get('height'),
		 pTop = this.get('padding-top'),
		 pBottom = this.get('padding-bottom');

		return height + pTop + pBottom;
	  },

	  'padding-box-width': function(element) {
		var width = this.get('width'),
		 pLeft = this.get('padding-left'),
		 pRight = this.get('padding-right');

		return width + pLeft + pRight;
	  },

	  'border-box-height': function(element) {
		if (!this._preComputing) this._begin();
		var height = element.offsetHeight;
		if (!this._preComputing) this._end();
		return height;
	  },

	  'border-box-width': function(element) {
		if (!this._preComputing) this._begin();
		var width = element.offsetWidth;
		if (!this._preComputing) this._end();
		return width;
	  },

	  'margin-box-height': function(element) {
		var bHeight = this.get('border-box-height'),
		 mTop = this.get('margin-top'),
		 mBottom = this.get('margin-bottom');

		if (bHeight <= 0) return 0;

		return bHeight + mTop + mBottom;
	  },

	  'margin-box-width': function(element) {
		var bWidth = this.get('border-box-width'),
		 mLeft = this.get('margin-left'),
		 mRight = this.get('margin-right');

		if (bWidth <= 0) return 0;

		return bWidth + mLeft + mRight;
	  },

	  'top': function(element) {
		var offset = element.positionedOffset();
		return offset.top;
	  },

	  'bottom': function(element) {
		var offset = element.positionedOffset(),
		 parent = element.getOffsetParent(),
		 pHeight = parent.measure('height');

		var mHeight = this.get('border-box-height');

		return pHeight - mHeight - offset.top;
	  },

	  'left': function(element) {
		var offset = element.positionedOffset();
		return offset.left;
	  },

	  'right': function(element) {
		var offset = element.positionedOffset(),
		 parent = element.getOffsetParent(),
		 pWidth = parent.measure('width');

		var mWidth = this.get('border-box-width');

		return pWidth - mWidth - offset.left;
	  },

	  'padding-top': function(element) {
		return getPixelValue(element, 'paddingTop');
	  },

	  'padding-bottom': function(element) {
		return getPixelValue(element, 'paddingBottom');
	  },

	  'padding-left': function(element) {
		return getPixelValue(element, 'paddingLeft');
	  },

	  'padding-right': function(element) {
		return getPixelValue(element, 'paddingRight');
	  },

	  'border-top': function(element) {
		return getPixelValue(element, 'borderTopWidth');
	  },

	  'border-bottom': function(element) {
		return getPixelValue(element, 'borderBottomWidth');
	  },

	  'border-left': function(element) {
		return getPixelValue(element, 'borderLeftWidth');
	  },

	  'border-right': function(element) {
		return getPixelValue(element, 'borderRightWidth');
	  },

	  'margin-top': function(element) {
		return getPixelValue(element, 'marginTop');
	  },

	  'margin-bottom': function(element) {
		return getPixelValue(element, 'marginBottom');
	  },

	  'margin-left': function(element) {
		return getPixelValue(element, 'marginLeft');
	  },

	  'margin-right': function(element) {
		return getPixelValue(element, 'marginRight');
	  }
	}
  });

  if ('getBoundingClientRect' in document.documentElement) {
	Object.extend(Element.Layout.COMPUTATIONS, {
	  'right': function(element) {
		var parent = hasLayout(element.getOffsetParent());
		var rect = element.getBoundingClientRect(),
		 pRect = parent.getBoundingClientRect();

		return (pRect.right - rect.right).round();
	  },

	  'bottom': function(element) {
		var parent = hasLayout(element.getOffsetParent());
		var rect = element.getBoundingClientRect(),
		 pRect = parent.getBoundingClientRect();

		return (pRect.bottom - rect.bottom).round();
	  }
	});
  }

  Element.Offset = Class.create({
	initialize: function(left, top) {
	  this.left = left.round();
	  this.top  = top.round();

	  this[0] = this.left;
	  this[1] = this.top;
	},

	relativeTo: function(offset) {
	  return new Element.Offset(
		this.left - offset.left,
		this.top  - offset.top
	  );
	},

	inspect: function() {
	  return "#<Element.Offset left: #{left} top: #{top}>".interpolate(this);
	},

	toString: function() {
	  return "[#{left}, #{top}]".interpolate(this);
	},

	toArray: function() {
	  return [this.left, this.top];
	}
  });

  function getLayout(element, preCompute) {
	return new Element.Layout(element, preCompute);
  }

  function measure(element, property) {
	return $(element).getLayout().get(property);
  }

  function getDimensions(element) {
	element = $(element);
	var display = Element.getStyle(element, 'display');

	if (display && display !== 'none') {
	  return { width: element.offsetWidth, height: element.offsetHeight };
	}

	var style = element.style;
	var originalStyles = {
	  visibility: style.visibility,
	  position:   style.position,
	  display:    style.display
	};

	var newStyles = {
	  visibility: 'hidden',
	  display:    'block'
	};

	if (originalStyles.position !== 'fixed')
	  newStyles.position = 'absolute';

	Element.setStyle(element, newStyles);

	var dimensions = {
	  width:  element.offsetWidth,
	  height: element.offsetHeight
	};

	Element.setStyle(element, originalStyles);

	return dimensions;
  }

  function getOffsetParent(element) {
	element = $(element);

	if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
	  return $(document.body);

	var isInline = (Element.getStyle(element, 'display') === 'inline');
	if (!isInline && element.offsetParent) return $(element.offsetParent);

	while ((element = element.parentNode) && element !== document.body) {
	  if (Element.getStyle(element, 'position') !== 'static') {
		return isHtml(element) ? $(document.body) : $(element);
	  }
	}

	return $(document.body);
  }


  function cumulativeOffset(element) {
	element = $(element);
	var valueT = 0, valueL = 0;
	if (element.parentNode) {
	  do {
		valueT += element.offsetTop  || 0;
		valueL += element.offsetLeft || 0;
		element = element.offsetParent;
	  } while (element);
	}
	return new Element.Offset(valueL, valueT);
  }

  function positionedOffset(element) {
	element = $(element);

	var layout = element.getLayout();

	var valueT = 0, valueL = 0;
	do {
	  valueT += element.offsetTop  || 0;
	  valueL += element.offsetLeft || 0;
	  element = element.offsetParent;
	  if (element) {
		if (isBody(element)) break;
		var p = Element.getStyle(element, 'position');
		if (p !== 'static') break;
	  }
	} while (element);

	valueL -= layout.get('margin-top');
	valueT -= layout.get('margin-left');

	return new Element.Offset(valueL, valueT);
  }

  function cumulativeScrollOffset(element) {
	var valueT = 0, valueL = 0;
	do {
	  valueT += element.scrollTop  || 0;
	  valueL += element.scrollLeft || 0;
	  element = element.parentNode;
	} while (element);
	return new Element.Offset(valueL, valueT);
  }

  function viewportOffset(forElement) {
	element = $(element);
	var valueT = 0, valueL = 0, docBody = document.body;

	var element = forElement;
	do {
	  valueT += element.offsetTop  || 0;
	  valueL += element.offsetLeft || 0;
	  if (element.offsetParent == docBody &&
		Element.getStyle(element, 'position') == 'absolute') break;
	} while (element = element.offsetParent);

	element = forElement;
	do {
	  if (element != docBody) {
		valueT -= element.scrollTop  || 0;
		valueL -= element.scrollLeft || 0;
	  }
	} while (element = element.parentNode);
	return new Element.Offset(valueL, valueT);
  }

  function absolutize(element) {
	element = $(element);

	if (Element.getStyle(element, 'position') === 'absolute') {
	  return element;
	}

	var offsetParent = getOffsetParent(element);
	var eOffset = element.viewportOffset(),
	 pOffset = offsetParent.viewportOffset();

	var offset = eOffset.relativeTo(pOffset);
	var layout = element.getLayout();

	element.store('prototype_absolutize_original_styles', {
	  left:   element.getStyle('left'),
	  top:    element.getStyle('top'),
	  width:  element.getStyle('width'),
	  height: element.getStyle('height')
	});

	element.setStyle({
	  position: 'absolute',
	  top:    offset.top + 'px',
	  left:   offset.left + 'px',
	  width:  layout.get('width') + 'px',
	  height: layout.get('height') + 'px'
	});

	return element;
  }

  function relativize(element) {
	element = $(element);
	if (Element.getStyle(element, 'position') === 'relative') {
	  return element;
	}

	var originalStyles =
	 element.retrieve('prototype_absolutize_original_styles');

	if (originalStyles) element.setStyle(originalStyles);
	return element;
  }

  if (Prototype.Browser.IE) {
	getOffsetParent = getOffsetParent.wrap(
	  function(proceed, element) {
		element = $(element);

		if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
		  return $(document.body);

		var position = element.getStyle('position');
		if (position !== 'static') return proceed(element);

		element.setStyle({ position: 'relative' });
		var value = proceed(element);
		element.setStyle({ position: position });
		return value;
	  }
	);

	positionedOffset = positionedOffset.wrap(function(proceed, element) {
	  element = $(element);
	  if (!element.parentNode) return new Element.Offset(0, 0);
	  var position = element.getStyle('position');
	  if (position !== 'static') return proceed(element);

	  var offsetParent = element.getOffsetParent();
	  if (offsetParent && offsetParent.getStyle('position') === 'fixed')
		hasLayout(offsetParent);

	  element.setStyle({ position: 'relative' });
	  var value = proceed(element);
	  element.setStyle({ position: position });
	  return value;
	});
  } else if (Prototype.Browser.Webkit) {
	cumulativeOffset = function(element) {
	  element = $(element);
	  var valueT = 0, valueL = 0;
	  do {
		valueT += element.offsetTop  || 0;
		valueL += element.offsetLeft || 0;
		if (element.offsetParent == document.body)
		  if (Element.getStyle(element, 'position') == 'absolute') break;

		element = element.offsetParent;
	  } while (element);

	  return new Element.Offset(valueL, valueT);
	};
  }


  Element.addMethods({
	getLayout:              getLayout,
	measure:                measure,
	getDimensions:          getDimensions,
	getOffsetParent:        getOffsetParent,
	cumulativeOffset:       cumulativeOffset,
	positionedOffset:       positionedOffset,
	cumulativeScrollOffset: cumulativeScrollOffset,
	viewportOffset:         viewportOffset,
	absolutize:             absolutize,
	relativize:             relativize
  });

  function isBody(element) {
	return element.nodeName.toUpperCase() === 'BODY';
  }

  function isHtml(element) {
	return element.nodeName.toUpperCase() === 'HTML';
  }

  function isDocument(element) {
	return element.nodeType === Node.DOCUMENT_NODE;
  }

  function isDetached(element) {
	return element !== document.body &&
	 !Element.descendantOf(element, document.body);
  }

  if ('getBoundingClientRect' in document.documentElement) {
	Element.addMethods({
	  viewportOffset: function(element) {
		element = $(element);
		if (isDetached(element)) return new Element.Offset(0, 0);

		var rect = element.getBoundingClientRect(),
		 docEl = document.documentElement;
		return new Element.Offset(rect.left - docEl.clientLeft,
		 rect.top - docEl.clientTop);
	  }
	});
  }
})();
window.$$ = function() {
  var expression = $A(arguments).join(', ');
  return Prototype.Selector.select(expression, document);
};

Prototype.Selector = (function() {

  function select() {
	throw new Error('Method "Prototype.Selector.select" must be defined.');
  }

  function match() {
	throw new Error('Method "Prototype.Selector.match" must be defined.');
  }

  function find(elements, expression, index) {
	index = index || 0;
	var match = Prototype.Selector.match, length = elements.length, matchIndex = 0, i;

	for (i = 0; i < length; i++) {
	  if (match(elements[i], expression) && index == matchIndex++) {
		return Element.extend(elements[i]);
	  }
	}
  }

  function extendElements(elements) {
	for (var i = 0, length = elements.length; i < length; i++) {
	  Element.extend(elements[i]);
	}
	return elements;
  }


  var K = Prototype.K;

  return {
	select: select,
	match: match,
	find: find,
	extendElements: (Element.extend === K) ? K : extendElements,
	extendElement: Element.extend
  };
})();
Prototype._original_property = window.Sizzle;
/*!
 * Sizzle CSS Selector Engine - v1.0
 *  Copyright 2009, The Dojo Foundation
 *  Released under the MIT, BSD, and GPL Licenses.
 *  More information: http://sizzlejs.com/
 */
(function(){

var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|['"][^'"]*['"]|[^[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
	done = 0,
	toString = Object.prototype.toString,
	hasDuplicate = false,
	baseHasDuplicate = true;

[0, 0].sort(function(){
	baseHasDuplicate = false;
	return 0;
});

var Sizzle = function(selector, context, results, seed) {
	results = results || [];
	var origContext = context = context || document;

	if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
		return [];
	}

	if ( !selector || typeof selector !== "string" ) {
		return results;
	}

	var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context),
		soFar = selector;

	while ( (chunker.exec(""), m = chunker.exec(soFar)) !== null ) {
		soFar = m[3];

		parts.push( m[1] );

		if ( m[2] ) {
			extra = m[3];
			break;
		}
	}

	if ( parts.length > 1 && origPOS.exec( selector ) ) {
		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
			set = posProcess( parts[0] + parts[1], context );
		} else {
			set = Expr.relative[ parts[0] ] ?
				[ context ] :
				Sizzle( parts.shift(), context );

			while ( parts.length ) {
				selector = parts.shift();

				if ( Expr.relative[ selector ] )
					selector += parts.shift();

				set = posProcess( selector, set );
			}
		}
	} else {
		if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
				Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
			var ret = Sizzle.find( parts.shift(), context, contextXML );
			context = ret.expr ? Sizzle.filter( ret.expr, ret.set )[0] : ret.set[0];
		}

		if ( context ) {
			var ret = seed ?
				{ expr: parts.pop(), set: makeArray(seed) } :
				Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
			set = ret.expr ? Sizzle.filter( ret.expr, ret.set ) : ret.set;

			if ( parts.length > 0 ) {
				checkSet = makeArray(set);
			} else {
				prune = false;
			}

			while ( parts.length ) {
				var cur = parts.pop(), pop = cur;

				if ( !Expr.relative[ cur ] ) {
					cur = "";
				} else {
					pop = parts.pop();
				}

				if ( pop == null ) {
					pop = context;
				}

				Expr.relative[ cur ]( checkSet, pop, contextXML );
			}
		} else {
			checkSet = parts = [];
		}
	}

	if ( !checkSet ) {
		checkSet = set;
	}

	if ( !checkSet ) {
		throw "Syntax error, unrecognized expression: " + (cur || selector);
	}

	if ( toString.call(checkSet) === "[object Array]" ) {
		if ( !prune ) {
			results.push.apply( results, checkSet );
		} else if ( context && context.nodeType === 1 ) {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
					results.push( set[i] );
				}
			}
		} else {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
					results.push( set[i] );
				}
			}
		}
	} else {
		makeArray( checkSet, results );
	}

	if ( extra ) {
		Sizzle( extra, origContext, results, seed );
		Sizzle.uniqueSort( results );
	}

	return results;
};

Sizzle.uniqueSort = function(results){
	if ( sortOrder ) {
		hasDuplicate = baseHasDuplicate;
		results.sort(sortOrder);

		if ( hasDuplicate ) {
			for ( var i = 1; i < results.length; i++ ) {
				if ( results[i] === results[i-1] ) {
					results.splice(i--, 1);
				}
			}
		}
	}

	return results;
};

Sizzle.matches = function(expr, set){
	return Sizzle(expr, null, null, set);
};

Sizzle.find = function(expr, context, isXML){
	var set, match;

	if ( !expr ) {
		return [];
	}

	for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
		var type = Expr.order[i], match;

		if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
			var left = match[1];
			match.splice(1,1);

			if ( left.substr( left.length - 1 ) !== "\\" ) {
				match[1] = (match[1] || "").replace(/\\/g, "");
				set = Expr.find[ type ]( match, context, isXML );
				if ( set != null ) {
					expr = expr.replace( Expr.match[ type ], "" );
					break;
				}
			}
		}
	}

	if ( !set ) {
		set = context.getElementsByTagName("*");
	}

	return {set: set, expr: expr};
};

Sizzle.filter = function(expr, set, inplace, not){
	var old = expr, result = [], curLoop = set, match, anyFound,
		isXMLFilter = set && set[0] && isXML(set[0]);

	while ( expr && set.length ) {
		for ( var type in Expr.filter ) {
			if ( (match = Expr.match[ type ].exec( expr )) != null ) {
				var filter = Expr.filter[ type ], found, item;
				anyFound = false;

				if ( curLoop == result ) {
					result = [];
				}

				if ( Expr.preFilter[ type ] ) {
					match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );

					if ( !match ) {
						anyFound = found = true;
					} else if ( match === true ) {
						continue;
					}
				}

				if ( match ) {
					for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
						if ( item ) {
							found = filter( item, match, i, curLoop );
							var pass = not ^ !!found;

							if ( inplace && found != null ) {
								if ( pass ) {
									anyFound = true;
								} else {
									curLoop[i] = false;
								}
							} else if ( pass ) {
								result.push( item );
								anyFound = true;
							}
						}
					}
				}

				if ( found !== undefined ) {
					if ( !inplace ) {
						curLoop = result;
					}

					expr = expr.replace( Expr.match[ type ], "" );

					if ( !anyFound ) {
						return [];
					}

					break;
				}
			}
		}

		if ( expr == old ) {
			if ( anyFound == null ) {
				throw "Syntax error, unrecognized expression: " + expr;
			} else {
				break;
			}
		}

		old = expr;
	}

	return curLoop;
};

var Expr = Sizzle.selectors = {
	order: [ "ID", "NAME", "TAG" ],
	match: {
		ID: /#((?:[\w\u00c0-\uFFFF-]|\\.)+)/,
		CLASS: /\.((?:[\w\u00c0-\uFFFF-]|\\.)+)/,
		NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF-]|\\.)+)['"]*\]/,
		ATTR: /\[\s*((?:[\w\u00c0-\uFFFF-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
		TAG: /^((?:[\w\u00c0-\uFFFF\*-]|\\.)+)/,
		CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
		POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
		PSEUDO: /:((?:[\w\u00c0-\uFFFF-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
	},
	leftMatch: {},
	attrMap: {
		"class": "className",
		"for": "htmlFor"
	},
	attrHandle: {
		href: function(elem){
			return elem.getAttribute("href");
		}
	},
	relative: {
		"+": function(checkSet, part, isXML){
			var isPartStr = typeof part === "string",
				isTag = isPartStr && !/\W/.test(part),
				isPartStrNotTag = isPartStr && !isTag;

			if ( isTag && !isXML ) {
				part = part.toUpperCase();
			}

			for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
				if ( (elem = checkSet[i]) ) {
					while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}

					checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?
						elem || false :
						elem === part;
				}
			}

			if ( isPartStrNotTag ) {
				Sizzle.filter( part, checkSet, true );
			}
		},
		">": function(checkSet, part, isXML){
			var isPartStr = typeof part === "string";

			if ( isPartStr && !/\W/.test(part) ) {
				part = isXML ? part : part.toUpperCase();

				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
					var elem = checkSet[i];
					if ( elem ) {
						var parent = elem.parentNode;
						checkSet[i] = parent.nodeName === part ? parent : false;
					}
				}
			} else {
				for ( var i = 0, l = checkSet.length; i < l; i++ ) {
					var elem = checkSet[i];
					if ( elem ) {
						checkSet[i] = isPartStr ?
							elem.parentNode :
							elem.parentNode === part;
					}
				}

				if ( isPartStr ) {
					Sizzle.filter( part, checkSet, true );
				}
			}
		},
		"": function(checkSet, part, isXML){
			var doneName = done++, checkFn = dirCheck;

			if ( !/\W/.test(part) ) {
				var nodeCheck = part = isXML ? part : part.toUpperCase();
				checkFn = dirNodeCheck;
			}

			checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
		},
		"~": function(checkSet, part, isXML){
			var doneName = done++, checkFn = dirCheck;

			if ( typeof part === "string" && !/\W/.test(part) ) {
				var nodeCheck = part = isXML ? part : part.toUpperCase();
				checkFn = dirNodeCheck;
			}

			checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
		}
	},
	find: {
		ID: function(match, context, isXML){
			if ( typeof context.getElementById !== "undefined" && !isXML ) {
				var m = context.getElementById(match[1]);
				return m ? [m] : [];
			}
		},
		NAME: function(match, context, isXML){
			if ( typeof context.getElementsByName !== "undefined" ) {
				var ret = [], results = context.getElementsByName(match[1]);

				for ( var i = 0, l = results.length; i < l; i++ ) {
					if ( results[i].getAttribute("name") === match[1] ) {
						ret.push( results[i] );
					}
				}

				return ret.length === 0 ? null : ret;
			}
		},
		TAG: function(match, context){
			return context.getElementsByTagName(match[1]);
		}
	},
	preFilter: {
		CLASS: function(match, curLoop, inplace, result, not, isXML){
			match = " " + match[1].replace(/\\/g, "") + " ";

			if ( isXML ) {
				return match;
			}

			for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
				if ( elem ) {
					if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {
						if ( !inplace )
							result.push( elem );
					} else if ( inplace ) {
						curLoop[i] = false;
					}
				}
			}

			return false;
		},
		ID: function(match){
			return match[1].replace(/\\/g, "");
		},
		TAG: function(match, curLoop){
			for ( var i = 0; curLoop[i] === false; i++ ){}
			return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
		},
		CHILD: function(match){
			if ( match[1] == "nth" ) {
				var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
					match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);

				match[2] = (test[1] + (test[2] || 1)) - 0;
				match[3] = test[3] - 0;
			}

			match[0] = done++;

			return match;
		},
		ATTR: function(match, curLoop, inplace, result, not, isXML){
			var name = match[1].replace(/\\/g, "");

			if ( !isXML && Expr.attrMap[name] ) {
				match[1] = Expr.attrMap[name];
			}

			if ( match[2] === "~=" ) {
				match[4] = " " + match[4] + " ";
			}

			return match;
		},
		PSEUDO: function(match, curLoop, inplace, result, not){
			if ( match[1] === "not" ) {
				if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
					match[3] = Sizzle(match[3], null, null, curLoop);
				} else {
					var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
					if ( !inplace ) {
						result.push.apply( result, ret );
					}
					return false;
				}
			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
				return true;
			}

			return match;
		},
		POS: function(match){
			match.unshift( true );
			return match;
		}
	},
	filters: {
		enabled: function(elem){
			return elem.disabled === false && elem.type !== "hidden";
		},
		disabled: function(elem){
			return elem.disabled === true;
		},
		checked: function(elem){
			return elem.checked === true;
		},
		selected: function(elem){
			elem.parentNode.selectedIndex;
			return elem.selected === true;
		},
		parent: function(elem){
			return !!elem.firstChild;
		},
		empty: function(elem){
			return !elem.firstChild;
		},
		has: function(elem, i, match){
			return !!Sizzle( match[3], elem ).length;
		},
		header: function(elem){
			return /h\d/i.test( elem.nodeName );
		},
		text: function(elem){
			return "text" === elem.type;
		},
		radio: function(elem){
			return "radio" === elem.type;
		},
		checkbox: function(elem){
			return "checkbox" === elem.type;
		},
		file: function(elem){
			return "file" === elem.type;
		},
		password: function(elem){
			return "password" === elem.type;
		},
		submit: function(elem){
			return "submit" === elem.type;
		},
		image: function(elem){
			return "image" === elem.type;
		},
		reset: function(elem){
			return "reset" === elem.type;
		},
		button: function(elem){
			return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
		},
		input: function(elem){
			return /input|select|textarea|button/i.test(elem.nodeName);
		}
	},
	setFilters: {
		first: function(elem, i){
			return i === 0;
		},
		last: function(elem, i, match, array){
			return i === array.length - 1;
		},
		even: function(elem, i){
			return i % 2 === 0;
		},
		odd: function(elem, i){
			return i % 2 === 1;
		},
		lt: function(elem, i, match){
			return i < match[3] - 0;
		},
		gt: function(elem, i, match){
			return i > match[3] - 0;
		},
		nth: function(elem, i, match){
			return match[3] - 0 == i;
		},
		eq: function(elem, i, match){
			return match[3] - 0 == i;
		}
	},
	filter: {
		PSEUDO: function(elem, match, i, array){
			var name = match[1], filter = Expr.filters[ name ];

			if ( filter ) {
				return filter( elem, i, match, array );
			} else if ( name === "contains" ) {
				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
			} else if ( name === "not" ) {
				var not = match[3];

				for ( var i = 0, l = not.length; i < l; i++ ) {
					if ( not[i] === elem ) {
						return false;
					}
				}

				return true;
			}
		},
		CHILD: function(elem, match){
			var type = match[1], node = elem;
			switch (type) {
				case 'only':
				case 'first':
					while ( (node = node.previousSibling) )  {
						if ( node.nodeType === 1 ) return false;
					}
					if ( type == 'first') return true;
					node = elem;
				case 'last':
					while ( (node = node.nextSibling) )  {
						if ( node.nodeType === 1 ) return false;
					}
					return true;
				case 'nth':
					var first = match[2], last = match[3];

					if ( first == 1 && last == 0 ) {
						return true;
					}

					var doneName = match[0],
						parent = elem.parentNode;

					if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
						var count = 0;
						for ( node = parent.firstChild; node; node = node.nextSibling ) {
							if ( node.nodeType === 1 ) {
								node.nodeIndex = ++count;
							}
						}
						parent.sizcache = doneName;
					}

					var diff = elem.nodeIndex - last;
					if ( first == 0 ) {
						return diff == 0;
					} else {
						return ( diff % first == 0 && diff / first >= 0 );
					}
			}
		},
		ID: function(elem, match){
			return elem.nodeType === 1 && elem.getAttribute("id") === match;
		},
		TAG: function(elem, match){
			return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
		},
		CLASS: function(elem, match){
			return (" " + (elem.className || elem.getAttribute("class")) + " ")
				.indexOf( match ) > -1;
		},
		ATTR: function(elem, match){
			var name = match[1],
				result = Expr.attrHandle[ name ] ?
					Expr.attrHandle[ name ]( elem ) :
					elem[ name ] != null ?
						elem[ name ] :
						elem.getAttribute( name ),
				value = result + "",
				type = match[2],
				check = match[4];

			return result == null ?
				type === "!=" :
				type === "=" ?
				value === check :
				type === "*=" ?
				value.indexOf(check) >= 0 :
				type === "~=" ?
				(" " + value + " ").indexOf(check) >= 0 :
				!check ?
				value && result !== false :
				type === "!=" ?
				value != check :
				type === "^=" ?
				value.indexOf(check) === 0 :
				type === "$=" ?
				value.substr(value.length - check.length) === check :
				type === "|=" ?
				value === check || value.substr(0, check.length + 1) === check + "-" :
				false;
		},
		POS: function(elem, match, i, array){
			var name = match[2], filter = Expr.setFilters[ name ];

			if ( filter ) {
				return filter( elem, i, match, array );
			}
		}
	}
};

var origPOS = Expr.match.POS;

for ( var type in Expr.match ) {
	Expr.match[ type ] = new RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
	Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source );
}

var makeArray = function(array, results) {
	array = Array.prototype.slice.call( array, 0 );

	if ( results ) {
		results.push.apply( results, array );
		return results;
	}

	return array;
};

try {
	Array.prototype.slice.call( document.documentElement.childNodes, 0 );

} catch(e){
	makeArray = function(array, results) {
		var ret = results || [];

		if ( toString.call(array) === "[object Array]" ) {
			Array.prototype.push.apply( ret, array );
		} else {
			if ( typeof array.length === "number" ) {
				for ( var i = 0, l = array.length; i < l; i++ ) {
					ret.push( array[i] );
				}
			} else {
				for ( var i = 0; array[i]; i++ ) {
					ret.push( array[i] );
				}
			}
		}

		return ret;
	};
}

var sortOrder;

if ( document.documentElement.compareDocumentPosition ) {
	sortOrder = function( a, b ) {
		if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
			if ( a == b ) {
				hasDuplicate = true;
			}
			return 0;
		}

		var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;
		if ( ret === 0 ) {
			hasDuplicate = true;
		}
		return ret;
	};
} else if ( "sourceIndex" in document.documentElement ) {
	sortOrder = function( a, b ) {
		if ( !a.sourceIndex || !b.sourceIndex ) {
			if ( a == b ) {
				hasDuplicate = true;
			}
			return 0;
		}

		var ret = a.sourceIndex - b.sourceIndex;
		if ( ret === 0 ) {
			hasDuplicate = true;
		}
		return ret;
	};
} else if ( document.createRange ) {
	sortOrder = function( a, b ) {
		if ( !a.ownerDocument || !b.ownerDocument ) {
			if ( a == b ) {
				hasDuplicate = true;
			}
			return 0;
		}

		var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();
		aRange.setStart(a, 0);
		aRange.setEnd(a, 0);
		bRange.setStart(b, 0);
		bRange.setEnd(b, 0);
		var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);
		if ( ret === 0 ) {
			hasDuplicate = true;
		}
		return ret;
	};
}

(function(){
	var form = document.createElement("div"),
		id = "script" + (new Date).getTime();
	form.innerHTML = "<a name='" + id + "'/>";

	var root = document.documentElement;
	root.insertBefore( form, root.firstChild );

	if ( !!document.getElementById( id ) ) {
		Expr.find.ID = function(match, context, isXML){
			if ( typeof context.getElementById !== "undefined" && !isXML ) {
				var m = context.getElementById(match[1]);
				return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
			}
		};

		Expr.filter.ID = function(elem, match){
			var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
			return elem.nodeType === 1 && node && node.nodeValue === match;
		};
	}

	root.removeChild( form );
	root = form = null; // release memory in IE
})();

(function(){

	var div = document.createElement("div");
	div.appendChild( document.createComment("") );

	if ( div.getElementsByTagName("*").length > 0 ) {
		Expr.find.TAG = function(match, context){
			var results = context.getElementsByTagName(match[1]);

			if ( match[1] === "*" ) {
				var tmp = [];

				for ( var i = 0; results[i]; i++ ) {
					if ( results[i].nodeType === 1 ) {
						tmp.push( results[i] );
					}
				}

				results = tmp;
			}

			return results;
		};
	}

	div.innerHTML = "<a href='#'></a>";
	if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
			div.firstChild.getAttribute("href") !== "#" ) {
		Expr.attrHandle.href = function(elem){
			return elem.getAttribute("href", 2);
		};
	}

	div = null; // release memory in IE
})();

if ( document.querySelectorAll ) (function(){
	var oldSizzle = Sizzle, div = document.createElement("div");
	div.innerHTML = "<p class='TEST'></p>";

	if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
		return;
	}

	Sizzle = function(query, context, extra, seed){
		context = context || document;

		if ( !seed && context.nodeType === 9 && !isXML(context) ) {
			try {
				return makeArray( context.querySelectorAll(query), extra );
			} catch(e){}
		}

		return oldSizzle(query, context, extra, seed);
	};

	for ( var prop in oldSizzle ) {
		Sizzle[ prop ] = oldSizzle[ prop ];
	}

	div = null; // release memory in IE
})();

if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){
	var div = document.createElement("div");
	div.innerHTML = "<div class='test e'></div><div class='test'></div>";

	if ( div.getElementsByClassName("e").length === 0 )
		return;

	div.lastChild.className = "e";

	if ( div.getElementsByClassName("e").length === 1 )
		return;

	Expr.order.splice(1, 0, "CLASS");
	Expr.find.CLASS = function(match, context, isXML) {
		if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
			return context.getElementsByClassName(match[1]);
		}
	};

	div = null; // release memory in IE
})();

function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
	var sibDir = dir == "previousSibling" && !isXML;
	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
		var elem = checkSet[i];
		if ( elem ) {
			if ( sibDir && elem.nodeType === 1 ){
				elem.sizcache = doneName;
				elem.sizset = i;
			}
			elem = elem[dir];
			var match = false;

			while ( elem ) {
				if ( elem.sizcache === doneName ) {
					match = checkSet[elem.sizset];
					break;
				}

				if ( elem.nodeType === 1 && !isXML ){
					elem.sizcache = doneName;
					elem.sizset = i;
				}

				if ( elem.nodeName === cur ) {
					match = elem;
					break;
				}

				elem = elem[dir];
			}

			checkSet[i] = match;
		}
	}
}

function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
	var sibDir = dir == "previousSibling" && !isXML;
	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
		var elem = checkSet[i];
		if ( elem ) {
			if ( sibDir && elem.nodeType === 1 ) {
				elem.sizcache = doneName;
				elem.sizset = i;
			}
			elem = elem[dir];
			var match = false;

			while ( elem ) {
				if ( elem.sizcache === doneName ) {
					match = checkSet[elem.sizset];
					break;
				}

				if ( elem.nodeType === 1 ) {
					if ( !isXML ) {
						elem.sizcache = doneName;
						elem.sizset = i;
					}
					if ( typeof cur !== "string" ) {
						if ( elem === cur ) {
							match = true;
							break;
						}

					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
						match = elem;
						break;
					}
				}

				elem = elem[dir];
			}

			checkSet[i] = match;
		}
	}
}

var contains = document.compareDocumentPosition ?  function(a, b){
	return a.compareDocumentPosition(b) & 16;
} : function(a, b){
	return a !== b && (a.contains ? a.contains(b) : true);
};

var isXML = function(elem){
	return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
		!!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";
};

var posProcess = function(selector, context){
	var tmpSet = [], later = "", match,
		root = context.nodeType ? [context] : context;

	while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
		later += match[0];
		selector = selector.replace( Expr.match.PSEUDO, "" );
	}

	selector = Expr.relative[selector] ? selector + "*" : selector;

	for ( var i = 0, l = root.length; i < l; i++ ) {
		Sizzle( selector, root[i], tmpSet );
	}

	return Sizzle.filter( later, tmpSet );
};


window.Sizzle = Sizzle;

})();

;(function(engine) {
  var extendElements = Prototype.Selector.extendElements;

  function select(selector, scope) {
	return extendElements(engine(selector, scope || document));
  }

  function match(element, selector) {
	return engine.matches(selector, [element]).length == 1;
  }

  Prototype.Selector.engine = engine;
  Prototype.Selector.select = select;
  Prototype.Selector.match = match;
})(Sizzle);

window.Sizzle = Prototype._original_property;
delete Prototype._original_property;

var Form = {
  reset: function(form) {
	form = $(form);
	form.reset();
	return form;
  },

  serializeElements: function(elements, options) {
	if (typeof options != 'object') options = { hash: !!options };
	else if (Object.isUndefined(options.hash)) options.hash = true;
	var key, value, submitted = false, submit = options.submit, accumulator, initial;

	if (options.hash) {
	  initial = {};
	  accumulator = function(result, key, value) {
		if (key in result) {
		  if (!Object.isArray(result[key])) result[key] = [result[key]];
		  result[key].push(value);
		} else result[key] = value;
		return result;
	  };
	} else {
	  initial = '';
	  accumulator = function(result, key, value) {
		return result + (result ? '&' : '') + encodeURIComponent(key) + '=' + encodeURIComponent(value);
	  }
	}

	return elements.inject(initial, function(result, element) {
	  if (!element.disabled && element.name) {
		key = element.name; value = $(element).getValue();
		if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
			submit !== false && (!submit || key == submit) && (submitted = true)))) {
		  result = accumulator(result, key, value);
		}
	  }
	  return result;
	});
  }
};

Form.Methods = {
  serialize: function(form, options) {
	return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
	var elements = $(form).getElementsByTagName('*'),
		element,
		arr = [ ],
		serializers = Form.Element.Serializers;
	for (var i = 0; element = elements[i]; i++) {
	  arr.push(element);
	}
	return arr.inject([], function(elements, child) {
	  if (serializers[child.tagName.toLowerCase()])
		elements.push(Element.extend(child));
	  return elements;
	})
  },

  getInputs: function(form, typeName, name) {
	form = $(form);
	var inputs = form.getElementsByTagName('input');

	if (!typeName && !name) return $A(inputs).map(Element.extend);

	for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
	  var input = inputs[i];
	  if ((typeName && input.type != typeName) || (name && input.name != name))
		continue;
	  matchingInputs.push(Element.extend(input));
	}

	return matchingInputs;
  },

  disable: function(form) {
	form = $(form);
	Form.getElements(form).invoke('disable');
	return form;
  },

  enable: function(form) {
	form = $(form);
	Form.getElements(form).invoke('enable');
	return form;
  },

  findFirstElement: function(form) {
	var elements = $(form).getElements().findAll(function(element) {
	  return 'hidden' != element.type && !element.disabled;
	});
	var firstByIndex = elements.findAll(function(element) {
	  return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
	}).sortBy(function(element) { return element.tabIndex }).first();

	return firstByIndex ? firstByIndex : elements.find(function(element) {
	  return /^(?:input|select|textarea)$/i.test(element.tagName);
	});
  },

  focusFirstElement: function(form) {
	form = $(form);
	var element = form.findFirstElement();
	if (element) element.activate();
	return form;
  },

  request: function(form, options) {
	form = $(form), options = Object.clone(options || { });

	var params = options.parameters, action = form.readAttribute('action') || '';
	if (action.blank()) action = window.location.href;
	options.parameters = form.serialize(true);

	if (params) {
	  if (Object.isString(params)) params = params.toQueryParams();
	  Object.extend(options.parameters, params);
	}

	if (form.hasAttribute('method') && !options.method)
	  options.method = form.method;

	return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/


Form.Element = {
  focus: function(element) {
	$(element).focus();
	return element;
  },

  select: function(element) {
	$(element).select();
	return element;
  }
};

Form.Element.Methods = {

  serialize: function(element) {
	element = $(element);
	if (!element.disabled && element.name) {
	  var value = element.getValue();
	  if (value != undefined) {
		var pair = { };
		pair[element.name] = value;
		return Object.toQueryString(pair);
	  }
	}
	return '';
  },

  getValue: function(element) {
	element = $(element);
	var method = element.tagName.toLowerCase();
	return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
	element = $(element);
	var method = element.tagName.toLowerCase();
	Form.Element.Serializers[method](element, value);
	return element;
  },

  clear: function(element) {
	$(element).value = '';
	return element;
  },

  present: function(element) {
	return $(element).value != '';
  },

  activate: function(element) {
	element = $(element);
	try {
	  element.focus();
	  if (element.select && (element.tagName.toLowerCase() != 'input' ||
		  !(/^(?:button|reset|submit)$/i.test(element.type))))
		element.select();
	} catch (e) { }
	return element;
  },

  disable: function(element) {
	element = $(element);
	element.disabled = true;
	return element;
  },

  enable: function(element) {
	element = $(element);
	element.disabled = false;
	return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;

var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = (function() {
  function input(element, value) {
	switch (element.type.toLowerCase()) {
	  case 'checkbox':
	  case 'radio':
		return inputSelector(element, value);
	  default:
		return valueSelector(element, value);
	}
  }

  function inputSelector(element, value) {
	if (Object.isUndefined(value))
	  return element.checked ? element.value : null;
	else element.checked = !!value;
  }

  function valueSelector(element, value) {
	if (Object.isUndefined(value)) return element.value;
	else element.value = value;
  }

  function select(element, value) {
	if (Object.isUndefined(value))
	  return (element.type === 'select-one' ? selectOne : selectMany)(element);

	var opt, currentValue, single = !Object.isArray(value);
	for (var i = 0, length = element.length; i < length; i++) {
	  opt = element.options[i];
	  currentValue = this.optionValue(opt);
	  if (single) {
		if (currentValue == value) {
		  opt.selected = true;
		  return;
		}
	  }
	  else opt.selected = value.include(currentValue);
	}
  }

  function selectOne(element) {
	var index = element.selectedIndex;
	return index >= 0 ? optionValue(element.options[index]) : null;
  }

  function selectMany(element) {
	var values, length = element.length;
	if (!length) return null;

	for (var i = 0, values = []; i < length; i++) {
	  var opt = element.options[i];
	  if (opt.selected) values.push(optionValue(opt));
	}
	return values;
  }

  function optionValue(opt) {
	return Element.hasAttribute(opt, 'value') ? opt.value : opt.text;
  }

  return {
	input:         input,
	inputSelector: inputSelector,
	textarea:      valueSelector,
	select:        select,
	selectOne:     selectOne,
	selectMany:    selectMany,
	optionValue:   optionValue,
	button:        valueSelector
  };
})();

/*--------------------------------------------------------------------------*/


Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
	$super(callback, frequency);
	this.element   = $(element);
	this.lastValue = this.getValue();
  },

  execute: function() {
	var value = this.getValue();
	if (Object.isString(this.lastValue) && Object.isString(value) ?
		this.lastValue != value : String(this.lastValue) != String(value)) {
	  this.callback(this.element, value);
	  this.lastValue = value;
	}
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
	return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
	return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
	this.element  = $(element);
	this.callback = callback;

	this.lastValue = this.getValue();
	if (this.element.tagName.toLowerCase() == 'form')
	  this.registerFormCallbacks();
	else
	  this.registerCallback(this.element);
  },

  onElementEvent: function() {
	var value = this.getValue();
	if (this.lastValue != value) {
	  this.callback(this.element, value);
	  this.lastValue = value;
	}
  },

  registerFormCallbacks: function() {
	Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
	if (element.type) {
	  switch (element.type.toLowerCase()) {
		case 'checkbox':
		case 'radio':
		  Event.observe(element, 'click', this.onElementEvent.bind(this));
		  break;
		default:
		  Event.observe(element, 'change', this.onElementEvent.bind(this));
		  break;
	  }
	}
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
	return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
	return Form.serialize(this.element);
  }
});
(function() {

  var Event = {
	KEY_BACKSPACE: 8,
	KEY_TAB:       9,
	KEY_RETURN:   13,
	KEY_ESC:      27,
	KEY_LEFT:     37,
	KEY_UP:       38,
	KEY_RIGHT:    39,
	KEY_DOWN:     40,
	KEY_DELETE:   46,
	KEY_HOME:     36,
	KEY_END:      35,
	KEY_PAGEUP:   33,
	KEY_PAGEDOWN: 34,
	KEY_INSERT:   45,

	cache: {}
  };

  var docEl = document.documentElement;
  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
	&& 'onmouseleave' in docEl;



  var isIELegacyEvent = function(event) { return false; };

  if (window.attachEvent) {
	if (window.addEventListener) {
	  isIELegacyEvent = function(event) {
		return !(event instanceof window.Event);
	  };
	} else {
	  isIELegacyEvent = function(event) { return true; };
	}
  }

  var _isButton;

  function _isButtonForDOMEvents(event, code) {
	return event.which ? (event.which === code + 1) : (event.button === code);
  }

  var legacyButtonMap = { 0: 1, 1: 4, 2: 2 };
  function _isButtonForLegacyEvents(event, code) {
	return event.button === legacyButtonMap[code];
  }

  function _isButtonForWebKit(event, code) {
	switch (code) {
	  case 0: return event.which == 1 && !event.metaKey;
	  case 1: return event.which == 2 || (event.which == 1 && event.metaKey);
	  case 2: return event.which == 3;
	  default: return false;
	}
  }

  if (window.attachEvent) {
	if (!window.addEventListener) {
	  _isButton = _isButtonForLegacyEvents;
	} else {
	  _isButton = function(event, code) {
		return isIELegacyEvent(event) ? _isButtonForLegacyEvents(event, code) :
		 _isButtonForDOMEvents(event, code);
	  }
	}
  } else if (Prototype.Browser.WebKit) {
	_isButton = _isButtonForWebKit;
  } else {
	_isButton = _isButtonForDOMEvents;
  }

  function isLeftClick(event)   { return _isButton(event, 0) }

  function isMiddleClick(event) { return _isButton(event, 1) }

  function isRightClick(event)  { return _isButton(event, 2) }

  function element(event) {
	event = Event.extend(event);

	var node = event.target, type = event.type,
	 currentTarget = event.currentTarget;

	if (currentTarget && currentTarget.tagName) {
	  if (type === 'load' || type === 'error' ||
		(type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
		  && currentTarget.type === 'radio'))
			node = currentTarget;
	}

	if (node.nodeType == Node.TEXT_NODE)
	  node = node.parentNode;

	return Element.extend(node);
  }

  function findElement(event, expression) {
	var element = Event.element(event);

	if (!expression) return element;
	while (element) {
	  if (Object.isElement(element) && Prototype.Selector.match(element, expression)) {
		return Element.extend(element);
	  }
	  element = element.parentNode;
	}
  }

  function pointer(event) {
	return { x: pointerX(event), y: pointerY(event) };
  }

  function pointerX(event) {
	var docElement = document.documentElement,
	 body = document.body || { scrollLeft: 0 };

	return event.pageX || (event.clientX +
	  (docElement.scrollLeft || body.scrollLeft) -
	  (docElement.clientLeft || 0));
  }

  function pointerY(event) {
	var docElement = document.documentElement,
	 body = document.body || { scrollTop: 0 };

	return  event.pageY || (event.clientY +
	   (docElement.scrollTop || body.scrollTop) -
	   (docElement.clientTop || 0));
  }


  function stop(event) {
	Event.extend(event);
	event.preventDefault();
	event.stopPropagation();

	event.stopped = true;
  }


  Event.Methods = {
	isLeftClick:   isLeftClick,
	isMiddleClick: isMiddleClick,
	isRightClick:  isRightClick,

	element:     element,
	findElement: findElement,

	pointer:  pointer,
	pointerX: pointerX,
	pointerY: pointerY,

	stop: stop
  };

  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
	m[name] = Event.Methods[name].methodize();
	return m;
  });

  if (window.attachEvent) {
	function _relatedTarget(event) {
	  var element;
	  switch (event.type) {
		case 'mouseover':
		case 'mouseenter':
		  element = event.fromElement;
		  break;
		case 'mouseout':
		case 'mouseleave':
		  element = event.toElement;
		  break;
		default:
		  return null;
	  }
	  return Element.extend(element);
	}

	var additionalMethods = {
	  stopPropagation: function() { this.cancelBubble = true },
	  preventDefault:  function() { this.returnValue = false },
	  inspect: function() { return '[object Event]' }
	};

	Event.extend = function(event, element) {
	  if (!event) return false;

	  if (!isIELegacyEvent(event)) return event;

	  if (event._extendedByPrototype) return event;
	  event._extendedByPrototype = Prototype.emptyFunction;

	  var pointer = Event.pointer(event);

	  Object.extend(event, {
		target: event.srcElement || element,
		relatedTarget: _relatedTarget(event),
		pageX:  pointer.x,
		pageY:  pointer.y
	  });

	  Object.extend(event, methods);
	  Object.extend(event, additionalMethods);

	  return event;
	};
  } else {
	Event.extend = Prototype.K;
  }

  if (window.addEventListener) {
	Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
	Object.extend(Event.prototype, methods);
  }

  function _createResponder(element, eventName, handler) {
	var registry = Element.retrieve(element, 'prototype_event_registry');

	if (Object.isUndefined(registry)) {
	  CACHE.push(element);
	  registry = Element.retrieve(element, 'prototype_event_registry', $H());
	}

	var respondersForEvent = registry.get(eventName);
	if (Object.isUndefined(respondersForEvent)) {
	  respondersForEvent = [];
	  registry.set(eventName, respondersForEvent);
	}

	if (respondersForEvent.pluck('handler').include(handler)) return false;

	var responder;
	if (eventName.include(":")) {
	  responder = function(event) {
		if (Object.isUndefined(event.eventName))
		  return false;

		if (event.eventName !== eventName)
		  return false;

		Event.extend(event, element);
		handler.call(element, event);
	  };
	} else {
	  if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
	   (eventName === "mouseenter" || eventName === "mouseleave")) {
		if (eventName === "mouseenter" || eventName === "mouseleave") {
		  responder = function(event) {
			Event.extend(event, element);

			var parent = event.relatedTarget;
			while (parent && parent !== element) {
			  try { parent = parent.parentNode; }
			  catch(e) { parent = element; }
			}

			if (parent === element) return;

			handler.call(element, event);
		  };
		}
	  } else {
		responder = function(event) {
		  Event.extend(event, element);
		  handler.call(element, event);
		};
	  }
	}

	responder.handler = handler;
	respondersForEvent.push(responder);
	return responder;
  }

  function _destroyCache() {
	for (var i = 0, length = CACHE.length; i < length; i++) {
	  Event.stopObserving(CACHE[i]);
	  CACHE[i] = null;
	}
  }

  var CACHE = [];

  if (Prototype.Browser.IE)
	window.attachEvent('onunload', _destroyCache);

  if (Prototype.Browser.WebKit)
	window.addEventListener('unload', Prototype.emptyFunction, false);


  var _getDOMEventName = Prototype.K,
	  translations = { mouseenter: "mouseover", mouseleave: "mouseout" };

  if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
	_getDOMEventName = function(eventName) {
	  return (translations[eventName] || eventName);
	};
  }

  function observe(element, eventName, handler) {
	element = $(element);

	var responder = _createResponder(element, eventName, handler);

	if (!responder) return element;

	if (eventName.include(':')) {
	  if (element.addEventListener)
		element.addEventListener("dataavailable", responder, false);
	  else {
		element.attachEvent("ondataavailable", responder);
		element.attachEvent("onlosecapture", responder);
	  }
	} else {
	  var actualEventName = _getDOMEventName(eventName);

	  if (element.addEventListener)
		element.addEventListener(actualEventName, responder, false);
	  else
		element.attachEvent("on" + actualEventName, responder);
	}

	return element;
  }

  function stopObserving(element, eventName, handler) {
	element = $(element);

	var registry = Element.retrieve(element, 'prototype_event_registry');
	if (!registry) return element;

	if (!eventName) {
	  registry.each( function(pair) {
		var eventName = pair.key;
		stopObserving(element, eventName);
	  });
	  return element;
	}

	var responders = registry.get(eventName);
	if (!responders) return element;

	if (!handler) {
	  responders.each(function(r) {
		stopObserving(element, eventName, r.handler);
	  });
	  return element;
	}

	var i = responders.length, responder;
	while (i--) {
	  if (responders[i].handler === handler) {
		responder = responders[i];
		break;
	  }
	}
	if (!responder) return element;

	if (eventName.include(':')) {
	  if (element.removeEventListener)
		element.removeEventListener("dataavailable", responder, false);
	  else {
		element.detachEvent("ondataavailable", responder);
		element.detachEvent("onlosecapture", responder);
	  }
	} else {
	  var actualEventName = _getDOMEventName(eventName);
	  if (element.removeEventListener)
		element.removeEventListener(actualEventName, responder, false);
	  else
		element.detachEvent('on' + actualEventName, responder);
	}

	registry.set(eventName, responders.without(responder));

	return element;
  }

  function fire(element, eventName, memo, bubble) {
	element = $(element);

	if (Object.isUndefined(bubble))
	  bubble = true;

	if (element == document && document.createEvent && !element.dispatchEvent)
	  element = document.documentElement;

	var event;
	if (document.createEvent) {
	  event = document.createEvent('HTMLEvents');
	  event.initEvent('dataavailable', bubble, true);
	} else {
	  event = document.createEventObject();
	  event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';
	}

	event.eventName = eventName;
	event.memo = memo || { };

	if (document.createEvent)
	  element.dispatchEvent(event);
	else
	  element.fireEvent(event.eventType, event);

	return Event.extend(event);
  }

  Event.Handler = Class.create({
	initialize: function(element, eventName, selector, callback) {
	  this.element   = $(element);
	  this.eventName = eventName;
	  this.selector  = selector;
	  this.callback  = callback;
	  this.handler   = this.handleEvent.bind(this);
	},

	start: function() {
	  Event.observe(this.element, this.eventName, this.handler);
	  return this;
	},

	stop: function() {
	  Event.stopObserving(this.element, this.eventName, this.handler);
	  return this;
	},

	handleEvent: function(event) {
	  var element = Event.findElement(event, this.selector);
	  if (element) this.callback.call(this.element, event, element);
	}
  });

  function on(element, eventName, selector, callback) {
	element = $(element);
	if (Object.isFunction(selector) && Object.isUndefined(callback)) {
	  callback = selector, selector = null;
	}

	return new Event.Handler(element, eventName, selector, callback).start();
  }

  Object.extend(Event, Event.Methods);

  Object.extend(Event, {
	fire:          fire,
	observe:       observe,
	stopObserving: stopObserving,
	on:            on
  });

  Element.addMethods({
	fire:          fire,

	observe:       observe,

	stopObserving: stopObserving,

	on:            on
  });

  Object.extend(document, {
	fire:          fire.methodize(),

	observe:       observe.methodize(),

	stopObserving: stopObserving.methodize(),

	on:            on.methodize(),

	loaded:        false
  });

  if (window.Event) Object.extend(window.Event, Event);
  else window.Event = Event;
})();

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
	 Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */

  var timer;

  function fireContentLoadedEvent() {
	if (document.loaded) return;
	if (timer) window.clearTimeout(timer);
	document.loaded = true;
	document.fire('dom:loaded');
  }

  function checkReadyState() {
	if (document.readyState === 'complete') {
	  document.stopObserving('readystatechange', checkReadyState);
	  fireContentLoadedEvent();
	}
  }

  function pollDoScroll() {
	try { document.documentElement.doScroll('left'); }
	catch(e) {
	  timer = pollDoScroll.defer();
	  return;
	}
	fireContentLoadedEvent();
  }

  if (document.addEventListener) {
	document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
  } else {
	document.observe('readystatechange', checkReadyState);
	if (window == top)
	  timer = pollDoScroll.defer();
  }

  Event.observe(window, 'load', fireContentLoadedEvent);
})();

Element.addMethods();

/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
	return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
	return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
	return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
	return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

var Position = {
  includeScrollOffsets: false,

  prepare: function() {
	this.deltaX =  window.pageXOffset
				|| document.documentElement.scrollLeft
				|| document.body.scrollLeft
				|| 0;
	this.deltaY =  window.pageYOffset
				|| document.documentElement.scrollTop
				|| document.body.scrollTop
				|| 0;
  },

  within: function(element, x, y) {
	if (this.includeScrollOffsets)
	  return this.withinIncludingScrolloffsets(element, x, y);
	this.xcomp = x;
	this.ycomp = y;
	this.offset = Element.cumulativeOffset(element);

	return (y >= this.offset[1] &&
			y <  this.offset[1] + element.offsetHeight &&
			x >= this.offset[0] &&
			x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
	var offsetcache = Element.cumulativeScrollOffset(element);

	this.xcomp = x + offsetcache[0] - this.deltaX;
	this.ycomp = y + offsetcache[1] - this.deltaY;
	this.offset = Element.cumulativeOffset(element);

	return (this.ycomp >= this.offset[1] &&
			this.ycomp <  this.offset[1] + element.offsetHeight &&
			this.xcomp >= this.offset[0] &&
			this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  overlap: function(mode, element) {
	if (!mode) return 0;
	if (mode == 'vertical')
	  return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
		element.offsetHeight;
	if (mode == 'horizontal')
	  return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
		element.offsetWidth;
  },


  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
	Position.prepare();
	return Element.absolutize(element);
  },

  relativize: function(element) {
	Position.prepare();
	return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
	options = options || { };
	return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
	return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
	className = className.toString().strip();
	var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
	return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
	className = className.toString().strip();
	var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
	if (!classNames && !className) return elements;

	var nodes = $(element).getElementsByTagName('*');
	className = ' ' + className + ' ';

	for (var i = 0, child, cn; child = nodes[i]; i++) {
	  if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
		  (classNames && classNames.all(function(name) {
			return !name.toString().blank() && cn.include(' ' + name + ' ');
		  }))))
		elements.push(Element.extend(child));
	}
	return elements;
  };

  return function(className, parentElement) {
	return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
	this.element = $(element);
  },

  _each: function(iterator) {
	this.element.className.split(/\s+/).select(function(name) {
	  return name.length > 0;
	})._each(iterator);
  },

  set: function(className) {
	this.element.className = className;
  },

  add: function(classNameToAdd) {
	if (this.include(classNameToAdd)) return;
	this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
	if (!this.include(classNameToRemove)) return;
	this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
	return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

(function() {
  window.Selector = Class.create({
	initialize: function(expression) {
	  this.expression = expression.strip();
	},

	findElements: function(rootElement) {
	  return Prototype.Selector.select(this.expression, rootElement);
	},

	match: function(element) {
	  return Prototype.Selector.match(element, this.expression);
	},

	toString: function() {
	  return this.expression;
	},

	inspect: function() {
	  return "#<Selector: " + this.expression + ">";
	}
  });

  Object.extend(Selector, {
	matchElements: function(elements, expression) {
	  var match = Prototype.Selector.match,
		  results = [];

	  for (var i = 0, length = elements.length; i < length; i++) {
		var element = elements[i];
		if (match(element, expression)) {
		  results.push(Element.extend(element));
		}
	  }
	  return results;
	},

	findElement: function(elements, expression, index) {
	  index = index || 0;
	  var matchIndex = 0, element;
	  for (var i = 0, length = elements.length; i < length; i++) {
		element = elements[i];
		if (Prototype.Selector.match(element, expression) && index === matchIndex++) {
		  return Element.extend(element);
		}
	  }
	},

	findChildElements: function(element, expressions) {
	  var selector = expressions.toArray().join(', ');
	  return Prototype.Selector.select(selector, element || document);
	}
  });
})();