/*  Prototype JavaScript framework, version 1.6.1
 *  (c) 2005-2009 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 : '1.6.1',

	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.*Safari/.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');
			var form = document.createElement('form');
			var 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() {
	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; i < properties.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;
		var properties = Object.keys(source);

		if (!Object.keys( {
			toString : true
		}).length) {
			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().first() == "$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;

	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(object) {
		var type = typeof object;
		switch (type) {
		case 'undefined':
		case 'function':
		case 'unknown':
			return;
		case 'boolean':
			return object.toString();
		}

		if (object === null)
			return 'null';
		if (object.toJSON)
			return object.toJSON();
		if (isElement(object))
			return;

		var results = [];
		for ( var property in object) {
			var value = toJSON(object[property]);
			if (!isUndefined(value))
				results.push(property.toJSON() + ': ' + value);
		}

		return '{' + results.join(', ') + '}';
	}

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

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

	function keys(object) {
		var results = [];
		for ( var property in object)
			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) == "[object Array]";
	}

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

	function isFunction(object) {
		return typeof object === "function";
	}

	function isString(object) {
		return _toString.call(object) == "[object String]";
	}

	function isNumber(object) {
		return _toString.call(object) == "[object Number]";
	}

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

	extend(Object, {
		extend : extend,
		inspect : inspect,
		toJSON : toJSON,
		toQueryString : toQueryString,
		toHTML : toHTML,
		keys : keys,
		values : values,
		clone : clone,
		isElement : isElement,
		isArray : isArray,
		isHash : isHash,
		isFunction : isFunction,
		isString : isString,
		isNumber : isNumber,
		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
			}
		})());

Date.prototype.toJSON = function() {
	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"';
};

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() {

					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');
						var 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());
										var 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() {
						var parts = this.split('-'), len = parts.length;
						if (len == 1)
							return parts[0];

						var camelized = this.charAt(0) == '-' ? parts[0]
								.charAt(0).toUpperCase()
								+ parts[0].substring(1) : parts[0];

						for ( var i = 1; i < len; i++)
							camelized += parts[i].charAt(0).toUpperCase()
									+ parts[i].substring(1);

						return camelized;
					}

					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 toJSON() {
						return this.inspect(true);
					}

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

					function isJSON() {
						var str = this;
						if (str.blank())
							return false;
						str = this.replace(/\\./g, '@').replace(
								/"[^"\\\n\r]*"/g, '');
						return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/)
								.test(str);
					}

					function evalJSON(sanitize) {
						var json = this.unfilterJSON();
						try {
							if (!sanitize || json.isJSON())
								return eval('(' + json + ')');
						} catch (e) {
						}
						throw new SyntaxError(
								'Badly formed JSON string: ' + this.inspect());
					}

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

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

					function endsWith(pattern) {
						var d = this.length - pattern.length;
						return d >= 0 && this.lastIndexOf(pattern) === 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 ? 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,
						toJSON : toJSON,
						unfilterJSON : unfilterJSON,
						isJSON : isJSON,
						evalJSON : 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];
			var 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) {
		for ( var i = 0, length = this.length; i < length; i++)
			iterator(this[i]);
	}
	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 : this.toArray())._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 toJSON() {
		var results = [];
		this.each(function(object) {
			var value = Object.toJSON(object);
			if (!Object.isUndefined(value))
				results.push(value);
		});
		return '[' + results.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,
		toJSON : toJSON
	});

	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))
					return results.concat(values.map(toQueryPair.curry(key)));
			} 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 toJSON() {
		return Object.toJSON(this.toObject());
	}

	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 : toJSON,
		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 toJSON() {
		return isFinite(this) ? this.toString() : 'null';
	}

	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,
		toJSON : toJSON,
		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.isString(this.options.parameters))
			this.options.parameters = this.options.parameters.toQueryParams();
		else 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.clone(this.options.parameters);

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

						this.parameters = params;

						if (params = Object.toQueryString(params)) {
							if (this.method == 'get')
								this.url += (this.url.include('?') ? '&' : '?')
										+ params;
							else if (/Konqueror|Safari|KHTML/
									.test(navigator.userAgent))
								params += '&_=';
						}

						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);
					},

					getStatus : function() {
						try {
							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 (!window.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) {

	var SETATTRIBUTE_IGNORES_NAME = (function() {
		var elForm = document.createElement("form");
		var elInput = document.createElement("input");
		var root = document.documentElement;
		elInput.setAttribute("name", "test");
		elForm.appendChild(elInput);
		root.appendChild(elForm);
		var isBuggy = elForm.elements ? (typeof elForm.elements.test == "undefined")
				: null;
		root.removeChild(elForm);
		elForm = elInput = null;
		return isBuggy;
	})();

	var element = global.Element;
	global.Element = function(tagName, attributes) {
		attributes = attributes || {};
		tagName = tagName.toLowerCase();
		var cache = Element.cache;
		if (SETATTRIBUTE_IGNORES_NAME && 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));
		return Element.writeAttribute(cache[tagName].cloneNode(false),
				attributes);
	};
	Object.extend(global.Element, element || {});
	if (element)
		global.Element.prototype = element.prototype;
})(this);

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

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 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);

			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 (SELECT_ELEMENT_INNERHTML_BUGGY || TABLE_ELEMENT_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 {
					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();
			var value = (element[property] || '').toString();
			if (value)
				result += ' ' + attribute + '=' + value.inspect(true);
		});
		return result + '>';
	},

	recursivelyCollect : function(element, property) {
		element = $(element);
		var elements = [];
		while (element = element[property])
			if (element.nodeType == 1)
				elements.push(Element.extend(element));
		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) {
		if (!(element = $(element).firstChild))
			return [];
		while (element && element.nodeType != 1)
			element = element.nextSibling;
		if (element)
			return [ element ].concat($(element).nextSiblings());
		return [];
	},

	previousSiblings : function(element) {
		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) {
		if (Object.isString(selector))
			selector = new Selector(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] : Selector
				.findElement(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 (arguments.length == 1)
			return $(Selector.handlers.previousElementSibling(element));
		var previousSiblings = Element.previousSiblings(element);
		return Object.isNumber(expression) ? previousSiblings[expression]
				: Selector.findElement(previousSiblings, expression, index);
	},

	next : function(element, expression, index) {
		element = $(element);
		if (arguments.length == 1)
			return $(Selector.handlers.nextElementSibling(element));
		var nextSiblings = Element.nextSiblings(element);
		return Object.isNumber(expression) ? nextSiblings[expression]
				: Selector.findElement(nextSiblings, expression, index);
	},

	select : function(element) {
		var args = Array.prototype.slice.call(arguments, 1);
		return Selector.findChildElements(element, args);
	},

	adjacent : function(element) {
		var args = Array.prototype.slice.call(arguments, 1);
		return Selector.findChildElements(element.parentNode, args).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;
	},

	getDimensions : function(element) {
		element = $(element);
		var display = Element.getStyle(element, 'display');
		if (display != 'none' && display != null) // Safari bug
			return {
				width : element.offsetWidth,
				height : element.offsetHeight
			};

		var els = element.style;
		var originalVisibility = els.visibility;
		var originalPosition = els.position;
		var originalDisplay = els.display;
		els.visibility = 'hidden';
		if (originalPosition != 'fixed') // Switching fixed to absolute
											// causes issues in Safari
			els.position = 'absolute';
		els.display = 'block';
		var originalWidth = element.clientWidth;
		var originalHeight = element.clientHeight;
		els.display = originalDisplay;
		els.position = originalPosition;
		els.visibility = originalVisibility;
		return {
			width : originalWidth,
			height : originalHeight
		};
	},

	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;
	},

	cumulativeOffset : function(element) {
		var valueT = 0, valueL = 0;
		do {
			valueT += element.offsetTop || 0;
			valueL += element.offsetLeft || 0;
			element = element.offsetParent;
		} while (element);
		return Element._returnOffset(valueL, valueT);
	},

	positionedOffset : function(element) {
		var valueT = 0, valueL = 0;
		do {
			valueT += element.offsetTop || 0;
			valueL += element.offsetLeft || 0;
			element = element.offsetParent;
			if (element) {
				if (element.tagName.toUpperCase() == 'BODY')
					break;
				var p = Element.getStyle(element, 'position');
				if (p !== 'static')
					break;
			}
		} while (element);
		return Element._returnOffset(valueL, valueT);
	},

	absolutize : function(element) {
		element = $(element);
		if (Element.getStyle(element, 'position') == 'absolute')
			return element;

		var offsets = Element.positionedOffset(element);
		var top = offsets[1];
		var left = offsets[0];
		var width = element.clientWidth;
		var height = element.clientHeight;

		element._originalLeft = left - parseFloat(element.style.left || 0);
		element._originalTop = top - parseFloat(element.style.top || 0);
		element._originalWidth = element.style.width;
		element._originalHeight = element.style.height;

		element.style.position = 'absolute';
		element.style.top = top + 'px';
		element.style.left = left + 'px';
		element.style.width = width + 'px';
		element.style.height = height + 'px';
		return element;
	},

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

		element.style.position = 'relative';
		var top = parseFloat(element.style.top || 0)
				- (element._originalTop || 0);
		var left = parseFloat(element.style.left || 0)
				- (element._originalLeft || 0);

		element.style.top = top + 'px';
		element.style.left = left + 'px';
		element.style.height = element._originalHeight;
		element.style.width = element._originalWidth;
		return element;
	},

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

	getOffsetParent : function(element) {
		if (element.offsetParent)
			return $(element.offsetParent);
		if (element == document.body)
			return $(element);

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

		return $(document.body);
	},

	viewportOffset : function(forElement) {
		var valueT = 0, valueL = 0;

		var element = forElement;
		do {
			valueT += element.offsetTop || 0;
			valueL += element.offsetLeft || 0;

			if (element.offsetParent == document.body
					&& Element.getStyle(element, 'position') == 'absolute')
				break;

		} while (element = element.offsetParent);

		element = forElement;
		do {
			if (!Prototype.Browser.Opera
					|| (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
				valueT -= element.scrollTop || 0;
				valueL -= element.scrollLeft || 0;
			}
		} while (element = element.parentNode);

		return Element._returnOffset(valueL, valueT);
	},

	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);

		element = $(element);
		var delta = [ 0, 0 ];
		var parent = null;
		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 'left':
		case 'top':
		case 'right':
		case 'bottom':
			if (proceed(element, 'position') === 'static')
				return null;
		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.getOffsetParent = Element.Methods.getOffsetParent
			.wrap(function(proceed, element) {
				element = $(element);
				try {
					element.offsetParent
				} catch (e) {
					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;
			});

	$w('positionedOffset viewportOffset')
			.each(
					function(method) {
						Element.Methods[method] = Element.Methods[method]
								.wrap(function(proceed, element) {
									element = $(element);
									try {
										element.offsetParent
									} catch (e) {
										return Element._returnOffset(0, 0)
									}
									var position = element.getStyle('position');
									if (position !== 'static')
										return proceed(element);
									var offsetParent = element
											.getOffsetParent();
									if (offsetParent
											&& offsetParent
													.getStyle('position') === 'fixed')
										offsetParent.setStyle( {
											zoom : 1
										});
									element.setStyle( {
										position : 'relative'
									});
									var value = proceed(element);
									element.setStyle( {
										position : position
									});
									return value;
								});
					});

	Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset
			.wrap(function(proceed, element) {
				try {
					element.offsetParent
				} catch (e) {
					return Element._returnOffset(0, 0)
				}
				return proceed(element);
			});

	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';
		var forProp = 'for';

		var 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');
						el.onclick = Prototype.emptyFunction;
						var value = el.getAttribute('onclick');
						var f;

						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;
	};

	Element.Methods.cumulativeOffset = function(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 Element._returnOffset(valueL, valueT);
	};
}

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();
			var 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) {
	var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
	if (t) {
		div.innerHTML = t[0] + html + t[1];
		t[2].times(function() {
			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);
				var 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;
})();

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

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)
		});
	}

	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);
		var 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[0];
				}

				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);
			}
		});
/*
 * Portions of the Selector class are derived from Jack Slocum's DomQuery, part
 * of YUI-Ext version 0.40, distributed under the terms of an MIT-style license.
 * Please see http://www.yui-ext.com/ for more information.
 */

var Selector = Class
		.create( {
			initialize : function(expression) {
				this.expression = expression.strip();

				if (this.shouldUseSelectorsAPI()) {
					this.mode = 'selectorsAPI';
				} else if (this.shouldUseXPath()) {
					this.mode = 'xpath';
					this.compileXPathMatcher();
				} else {
					this.mode = "normal";
					this.compileMatcher();
				}

			},

			shouldUseXPath : (function() {

				var IS_DESCENDANT_SELECTOR_BUGGY = (function() {
					var isBuggy = false;
					if (document.evaluate && window.XPathResult) {
						var el = document.createElement('div');
						el.innerHTML = '<ul><li></li></ul><div><ul><li></li></ul></div>';

						var xpath = ".//*[local-name()='ul' or local-name()='UL']"
								+ "//*[local-name()='li' or local-name()='LI']";

						var result = document.evaluate(xpath, el, null,
								XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

						isBuggy = (result.snapshotLength !== 2);
						el = null;
					}
					return isBuggy;
				})();

				return function() {
					if (!Prototype.BrowserFeatures.XPath)
						return false;

					var e = this.expression;

					if (Prototype.Browser.WebKit
							&& (e.include("-of-type") || e.include(":empty")))
						return false;

					if ((/(\[[\w-]*?:|:checked)/).test(e))
						return false;

					if (IS_DESCENDANT_SELECTOR_BUGGY)
						return false;

					return true;
				}

			})(),

			shouldUseSelectorsAPI : function() {
				if (!Prototype.BrowserFeatures.SelectorsAPI)
					return false;

				if (Selector.CASE_INSENSITIVE_CLASS_NAMES)
					return false;

				if (!Selector._div)
					Selector._div = new Element('div');

				try {
					Selector._div.querySelector(this.expression);
				} catch (e) {
					return false;
				}

				return true;
			},

			compileMatcher : function() {
				var e = this.expression, ps = Selector.patterns, h = Selector.handlers, c = Selector.criteria, le, p, m, len = ps.length, name;

				if (Selector._cache[e]) {
					this.matcher = Selector._cache[e];
					return;
				}

				this.matcher = [ "this.matcher = function(root) {",
						"var r = root, h = Selector.handlers, c = false, n;" ];

				while (e && le != e && (/\S/).test(e)) {
					le = e;
					for ( var i = 0; i < len; i++) {
						p = ps[i].re;
						name = ps[i].name;
						if (m = e.match(p)) {
							this.matcher
									.push(Object.isFunction(c[name]) ? c[name]
											(m) : new Template(c[name])
											.evaluate(m));
							e = e.replace(m[0], '');
							break;
						}
					}
				}

				this.matcher.push("return h.unique(n);\n}");
				eval(this.matcher.join('\n'));
				Selector._cache[this.expression] = this.matcher;
			},

			compileXPathMatcher : function() {
				var e = this.expression, ps = Selector.patterns, x = Selector.xpath, le, m, len = ps.length, name;

				if (Selector._cache[e]) {
					this.xpath = Selector._cache[e];
					return;
				}

				this.matcher = [ './/*' ];
				while (e && le != e && (/\S/).test(e)) {
					le = e;
					for ( var i = 0; i < len; i++) {
						name = ps[i].name;
						if (m = e.match(ps[i].re)) {
							this.matcher
									.push(Object.isFunction(x[name]) ? x[name]
											(m) : new Template(x[name])
											.evaluate(m));
							e = e.replace(m[0], '');
							break;
						}
					}
				}

				this.xpath = this.matcher.join('');
				Selector._cache[this.expression] = this.xpath;
			},

			findElements : function(root) {
				root = root || document;
				var e = this.expression, results;

				switch (this.mode) {
				case 'selectorsAPI':
					if (root !== document) {
						var oldId = root.id, id = $(root).identify();
						id = id.replace(/([\.:])/g, "\\$1");
						e = "#" + id + " " + e;
					}

					results = $A(root.querySelectorAll(e)).map(Element.extend);
					root.id = oldId;

					return results;
				case 'xpath':
					return document._getElementsByXPath(this.xpath, root);
				default:
					return this.matcher(root);
				}
			},

			match : function(element) {
				this.tokens = [];

				var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
				var le, p, m, len = ps.length, name;

				while (e && le !== e && (/\S/).test(e)) {
					le = e;
					for ( var i = 0; i < len; i++) {
						p = ps[i].re;
						name = ps[i].name;
						if (m = e.match(p)) {
							if (as[name]) {
								this.tokens.push( [ name, Object.clone(m) ]);
								e = e.replace(m[0], '');
							} else {
								return this.findElements(document).include(
										element);
							}
						}
					}
				}

				var match = true, name, matches;
				for ( var i = 0, token; token = this.tokens[i]; i++) {
					name = token[0], matches = token[1];
					if (!Selector.assertions[name](element, matches)) {
						match = false;
						break;
					}
				}

				return match;
			},

			toString : function() {
				return this.expression;
			},

			inspect : function() {
				return "#<Selector:" + this.expression.inspect() + ">";
			}
		});

if (Prototype.BrowserFeatures.SelectorsAPI
		&& document.compatMode === 'BackCompat') {
	Selector.CASE_INSENSITIVE_CLASS_NAMES = (function() {
		var div = document.createElement('div'), span = document
				.createElement('span');

		div.id = "prototype_test_id";
		span.className = 'Test';
		div.appendChild(span);
		var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);
		div = span = null;
		return isIgnored;
	})();
}

Object
		.extend(
				Selector,
				{
					_cache : {},

					xpath : {
						descendant : "//*",
						child : "/*",
						adjacent : "/following-sibling::*[1]",
						laterSibling : '/following-sibling::*',
						tagName : function(m) {
							if (m[1] == '*')
								return '';
							return "[local-name()='" + m[1].toLowerCase()
									+ "' or local-name()='"
									+ m[1].toUpperCase() + "']";
						},
						className : "[contains(concat(' ', @class, ' '), ' #{1} ')]",
						id : "[@id='#{1}']",
						attrPresence : function(m) {
							m[1] = m[1].toLowerCase();
							return new Template("[@#{1}]").evaluate(m);
						},
						attr : function(m) {
							m[1] = m[1].toLowerCase();
							m[3] = m[5] || m[6];
							return new Template(Selector.xpath.operators[m[2]])
									.evaluate(m);
						},
						pseudo : function(m) {
							var h = Selector.xpath.pseudos[m[1]];
							if (!h)
								return '';
							if (Object.isFunction(h))
								return h(m);
							return new Template(Selector.xpath.pseudos[m[1]])
									.evaluate(m);
						},
						operators : {
							'=' : "[@#{1}='#{3}']",
							'!=' : "[@#{1}!='#{3}']",
							'^=' : "[starts-with(@#{1}, '#{3}')]",
							'$=' : "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
							'*=' : "[contains(@#{1}, '#{3}')]",
							'~=' : "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
							'|=' : "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
						},
						pseudos : {
							'first-child' : '[not(preceding-sibling::*)]',
							'last-child' : '[not(following-sibling::*)]',
							'only-child' : '[not(preceding-sibling::* or following-sibling::*)]',
							'empty' : "[count(*) = 0 and (count(text()) = 0)]",
							'checked' : "[@checked]",
							'disabled' : "[(@disabled) and (@type!='hidden')]",
							'enabled' : "[not(@disabled) and (@type!='hidden')]",
							'not' : function(m) {
								var e = m[6], p = Selector.patterns, x = Selector.xpath, le, v, len = p.length, name;

								var exclusion = [];
								while (e && le != e && (/\S/).test(e)) {
									le = e;
									for ( var i = 0; i < len; i++) {
										name = p[i].name
										if (m = e.match(p[i].re)) {
											v = Object.isFunction(x[name]) ? x[name]
													(m)
													: new Template(x[name])
															.evaluate(m);
											exclusion
													.push("("
															+ v
																	.substring(
																			1,
																			v.length - 1)
															+ ")");
											e = e.replace(m[0], '');
											break;
										}
									}
								}
								return "[not(" + exclusion.join(" and ") + ")]";
							},
							'nth-child' : function(m) {
								return Selector.xpath.pseudos.nth(
										"(count(./preceding-sibling::*) + 1) ",
										m);
							},
							'nth-last-child' : function(m) {
								return Selector.xpath.pseudos.nth(
										"(count(./following-sibling::*) + 1) ",
										m);
							},
							'nth-of-type' : function(m) {
								return Selector.xpath.pseudos.nth(
										"position() ", m);
							},
							'nth-last-of-type' : function(m) {
								return Selector.xpath.pseudos.nth(
										"(last() + 1 - position()) ", m);
							},
							'first-of-type' : function(m) {
								m[6] = "1";
								return Selector.xpath.pseudos['nth-of-type'](m);
							},
							'last-of-type' : function(m) {
								m[6] = "1";
								return Selector.xpath.pseudos['nth-last-of-type']
										(m);
							},
							'only-of-type' : function(m) {
								var p = Selector.xpath.pseudos;
								return p['first-of-type'](m)
										+ p['last-of-type'](m);
							},
							nth : function(fragment, m) {
								var mm, formula = m[6], predicate;
								if (formula == 'even')
									formula = '2n+0';
								if (formula == 'odd')
									formula = '2n+1';
								if (mm = formula.match(/^(\d+)$/)) // digit
																	// only
								return '[' + fragment + "= " + mm[1] + ']';
							if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
								if (mm[1] == "-")
									mm[1] = -1;
								var a = mm[1] ? Number(mm[1]) : 1;
								var b = mm[2] ? Number(mm[2]) : 0;
								predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and "
										+ "((#{fragment} - #{b}) div #{a} >= 0)]";
								return new Template(predicate).evaluate( {
									fragment : fragment,
									a : a,
									b : b
								});
							}
						}
						}
					},

					criteria : {
						tagName : 'n = h.tagName(n, r, "#{1}", c);      c = false;',
						className : 'n = h.className(n, r, "#{1}", c);    c = false;',
						id : 'n = h.id(n, r, "#{1}", c);           c = false;',
						attrPresence : 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
						attr : function(m) {
							m[3] = (m[5] || m[6]);
							return new Template(
									'n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;')
									.evaluate(m);
						},
						pseudo : function(m) {
							if (m[6])
								m[6] = m[6].replace(/"/g, '\\"');
							return new Template(
									'n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;')
									.evaluate(m);
						},
						descendant : 'c = "descendant";',
						child : 'c = "child";',
						adjacent : 'c = "adjacent";',
						laterSibling : 'c = "laterSibling";'
					},

					patterns : [
							{
								name : 'laterSibling',
								re : /^\s*~\s*/
							},
							{
								name : 'child',
								re : /^\s*>\s*/
							},
							{
								name : 'adjacent',
								re : /^\s*\+\s*/
							},
							{
								name : 'descendant',
								re : /^\s/
							},

							{
								name : 'tagName',
								re : /^\s*(\*|[\w\-]+)(\b|$)?/
							},
							{
								name : 'id',
								re : /^#([\w\-\*]+)(\b|$)/
							},
							{
								name : 'className',
								re : /^\.([\w\-\*]+)(\b|$)/
							},
							{
								name : 'pseudo',
								re : /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/
							},
							{
								name : 'attrPresence',
								re : /^\[((?:[\w-]+:)?[\w-]+)\]/
							},
							{
								name : 'attr',
								re : /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
							} ],

					assertions : {
						tagName : function(element, matches) {
							return matches[1].toUpperCase() == element.tagName
									.toUpperCase();
						},

						className : function(element, matches) {
							return Element.hasClassName(element, matches[1]);
						},

						id : function(element, matches) {
							return element.id === matches[1];
						},

						attrPresence : function(element, matches) {
							return Element.hasAttribute(element, matches[1]);
						},

						attr : function(element, matches) {
							var nodeValue = Element.readAttribute(element,
									matches[1]);
							return nodeValue
									&& Selector.operators[matches[2]]
											(nodeValue, matches[5]
													|| matches[6]);
						}
					},

					handlers : {
						concat : function(a, b) {
							for ( var i = 0, node; node = b[i]; i++)
								a.push(node);
							return a;
						},

						mark : function(nodes) {
							var _true = Prototype.emptyFunction;
							for ( var i = 0, node; node = nodes[i]; i++)
								node._countedByPrototype = _true;
							return nodes;
						},

						unmark : (function() {

							var PROPERTIES_ATTRIBUTES_MAP = (function() {
								var el = document.createElement('div'), isBuggy = false, propName = '_countedByPrototype', value = 'x'
								el[propName] = value;
								isBuggy = (el.getAttribute(propName) === value);
								el = null;
								return isBuggy;
							})();

							return PROPERTIES_ATTRIBUTES_MAP ? function(nodes) {
								for ( var i = 0, node; node = nodes[i]; i++)
									node.removeAttribute('_countedByPrototype');
								return nodes;
							}
									: function(nodes) {
										for ( var i = 0, node; node = nodes[i]; i++)
											node._countedByPrototype = void 0;
										return nodes;
									}
						})(),

						index : function(parentNode, reverse, ofType) {
							parentNode._countedByPrototype = Prototype.emptyFunction;
							if (reverse) {
								for ( var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
									var node = nodes[i];
									if (node.nodeType == 1
											&& (!ofType || node._countedByPrototype))
										node.nodeIndex = j++;
								}
							} else {
								for ( var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
									if (node.nodeType == 1
											&& (!ofType || node._countedByPrototype))
										node.nodeIndex = j++;
							}
						},

						unique : function(nodes) {
							if (nodes.length == 0)
								return nodes;
							var results = [], n;
							for ( var i = 0, l = nodes.length; i < l; i++)
								if (typeof (n = nodes[i])._countedByPrototype == 'undefined') {
									n._countedByPrototype = Prototype.emptyFunction;
									results.push(Element.extend(n));
								}
							return Selector.handlers.unmark(results);
						},

						descendant : function(nodes) {
							var h = Selector.handlers;
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								h.concat(results, node
										.getElementsByTagName('*'));
							return results;
						},

						child : function(nodes) {
							var h = Selector.handlers;
							for ( var i = 0, results = [], node; node = nodes[i]; i++) {
								for ( var j = 0, child; child = node.childNodes[j]; j++)
									if (child.nodeType == 1
											&& child.tagName != '!')
										results.push(child);
							}
							return results;
						},

						adjacent : function(nodes) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++) {
								var next = this.nextElementSibling(node);
								if (next)
									results.push(next);
							}
							return results;
						},

						laterSibling : function(nodes) {
							var h = Selector.handlers;
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								h.concat(results, Element.nextSiblings(node));
							return results;
						},

						nextElementSibling : function(node) {
							while (node = node.nextSibling)
								if (node.nodeType == 1)
									return node;
							return null;
						},

						previousElementSibling : function(node) {
							while (node = node.previousSibling)
								if (node.nodeType == 1)
									return node;
							return null;
						},

						tagName : function(nodes, root, tagName, combinator) {
							var uTagName = tagName.toUpperCase();
							var results = [], h = Selector.handlers;
							if (nodes) {
								if (combinator) {
									if (combinator == "descendant") {
										for ( var i = 0, node; node = nodes[i]; i++)
											h
													.concat(
															results,
															node
																	.getElementsByTagName(tagName));
										return results;
									} else
										nodes = this[combinator](nodes);
									if (tagName == "*")
										return nodes;
								}
								for ( var i = 0, node; node = nodes[i]; i++)
									if (node.tagName.toUpperCase() === uTagName)
										results.push(node);
								return results;
							} else
								return root.getElementsByTagName(tagName);
						},

						id : function(nodes, root, id, combinator) {
							var targetNode = $(id), h = Selector.handlers;

							if (root == document) {
								if (!targetNode)
									return [];
								if (!nodes)
									return [ targetNode ];
							} else {
								if (!root.sourceIndex || root.sourceIndex < 1) {
									var nodes = root.getElementsByTagName('*');
									for ( var j = 0, node; node = nodes[j]; j++) {
										if (node.id === id)
											return [ node ];
									}
								}
							}

							if (nodes) {
								if (combinator) {
									if (combinator == 'child') {
										for ( var i = 0, node; node = nodes[i]; i++)
											if (targetNode.parentNode == node)
												return [ targetNode ];
									} else if (combinator == 'descendant') {
										for ( var i = 0, node; node = nodes[i]; i++)
											if (Element.descendantOf(
													targetNode, node))
												return [ targetNode ];
									} else if (combinator == 'adjacent') {
										for ( var i = 0, node; node = nodes[i]; i++)
											if (Selector.handlers
													.previousElementSibling(targetNode) == node)
												return [ targetNode ];
									} else
										nodes = h[combinator](nodes);
								}
								for ( var i = 0, node; node = nodes[i]; i++)
									if (node == targetNode)
										return [ targetNode ];
								return [];
							}
							return (targetNode && Element.descendantOf(
									targetNode, root)) ? [ targetNode ] : [];
						},

						className : function(nodes, root, className, combinator) {
							if (nodes && combinator)
								nodes = this[combinator](nodes);
							return Selector.handlers.byClassName(nodes, root,
									className);
						},

						byClassName : function(nodes, root, className) {
							if (!nodes)
								nodes = Selector.handlers.descendant( [ root ]);
							var needle = ' ' + className + ' ';
							for ( var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
								nodeClassName = node.className;
								if (nodeClassName.length == 0)
									continue;
								if (nodeClassName == className
										|| (' ' + nodeClassName + ' ')
												.include(needle))
									results.push(node);
							}
							return results;
						},

						attrPresence : function(nodes, root, attr, combinator) {
							if (!nodes)
								nodes = root.getElementsByTagName("*");
							if (nodes && combinator)
								nodes = this[combinator](nodes);
							var results = [];
							for ( var i = 0, node; node = nodes[i]; i++)
								if (Element.hasAttribute(node, attr))
									results.push(node);
							return results;
						},

						attr : function(nodes, root, attr, value, operator,
								combinator) {
							if (!nodes)
								nodes = root.getElementsByTagName("*");
							if (nodes && combinator)
								nodes = this[combinator](nodes);
							var handler = Selector.operators[operator], results = [];
							for ( var i = 0, node; node = nodes[i]; i++) {
								var nodeValue = Element.readAttribute(node,
										attr);
								if (nodeValue === null)
									continue;
								if (handler(nodeValue, value))
									results.push(node);
							}
							return results;
						},

						pseudo : function(nodes, name, value, root, combinator) {
							if (nodes && combinator)
								nodes = this[combinator](nodes);
							if (!nodes)
								nodes = root.getElementsByTagName("*");
							return Selector.pseudos[name](nodes, value, root);
						}
					},

					pseudos : {
						'first-child' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++) {
								if (Selector.handlers
										.previousElementSibling(node))
									continue;
								results.push(node);
							}
							return results;
						},
						'last-child' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++) {
								if (Selector.handlers.nextElementSibling(node))
									continue;
								results.push(node);
							}
							return results;
						},
						'only-child' : function(nodes, value, root) {
							var h = Selector.handlers;
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								if (!h.previousElementSibling(node)
										&& !h.nextElementSibling(node))
									results.push(node);
							return results;
						},
						'nth-child' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, formula, root);
						},
						'nth-last-child' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, formula, root,
									true);
						},
						'nth-of-type' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, formula, root,
									false, true);
						},
						'nth-last-of-type' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, formula, root,
									true, true);
						},
						'first-of-type' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, "1", root,
									false, true);
						},
						'last-of-type' : function(nodes, formula, root) {
							return Selector.pseudos.nth(nodes, "1", root, true,
									true);
						},
						'only-of-type' : function(nodes, formula, root) {
							var p = Selector.pseudos;
							return p['last-of-type'](p['first-of-type'](nodes,
									formula, root), formula, root);
						},

						getIndices : function(a, b, total) {
							if (a == 0)
								return b > 0 ? [ b ] : [];
							return $R(1, total).inject( [], function(memo, i) {
								if (0 == (i - b) % a && (i - b) / a >= 0)
									memo.push(i);
								return memo;
							});
						},

						nth : function(nodes, formula, root, reverse, ofType) {
							if (nodes.length == 0)
								return [];
							if (formula == 'even')
								formula = '2n+0';
							if (formula == 'odd')
								formula = '2n+1';
							var h = Selector.handlers, results = [], indexed = [], m;
							h.mark(nodes);
							for ( var i = 0, node; node = nodes[i]; i++) {
								if (!node.parentNode._countedByPrototype) {
									h.index(node.parentNode, reverse, ofType);
									indexed.push(node.parentNode);
								}
							}
							if (formula.match(/^\d+$/)) { // just a number
								formula = Number(formula);
								for ( var i = 0, node; node = nodes[i]; i++)
									if (node.nodeIndex == formula)
										results.push(node);
							} else if (m = formula
									.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
								if (m[1] == "-")
									m[1] = -1;
								var a = m[1] ? Number(m[1]) : 1;
								var b = m[2] ? Number(m[2]) : 0;
								var indices = Selector.pseudos.getIndices(a, b,
										nodes.length);
								for ( var i = 0, node, l = indices.length; node = nodes[i]; i++) {
									for ( var j = 0; j < l; j++)
										if (node.nodeIndex == indices[j])
											results.push(node);
								}
							}
							h.unmark(nodes);
							h.unmark(indexed);
							return results;
						},

						'empty' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++) {
								if (node.tagName == '!' || node.firstChild)
									continue;
								results.push(node);
							}
							return results;
						},

						'not' : function(nodes, selector, root) {
							var h = Selector.handlers, selectorType, m;
							var exclusions = new Selector(selector)
									.findElements(root);
							h.mark(exclusions);
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								if (!node._countedByPrototype)
									results.push(node);
							h.unmark(exclusions);
							return results;
						},

						'enabled' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								if (!node.disabled
										&& (!node.type || node.type !== 'hidden'))
									results.push(node);
							return results;
						},

						'disabled' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								if (node.disabled)
									results.push(node);
							return results;
						},

						'checked' : function(nodes, value, root) {
							for ( var i = 0, results = [], node; node = nodes[i]; i++)
								if (node.checked)
									results.push(node);
							return results;
						}
					},

					operators : {
						'=' : function(nv, v) {
							return nv == v;
						},
						'!=' : function(nv, v) {
							return nv != v;
						},
						'^=' : function(nv, v) {
							return nv == v || nv && nv.startsWith(v);
						},
						'$=' : function(nv, v) {
							return nv == v || nv && nv.endsWith(v);
						},
						'*=' : function(nv, v) {
							return nv == v || nv && nv.include(v);
						},
						'~=' : function(nv, v) {
							return (' ' + nv + ' ').include(' ' + v + ' ');
						},
						'|=' : function(nv, v) {
							return ('-' + (nv || "").toUpperCase() + '-')
									.include('-' + (v || "").toUpperCase() + '-');
						}
					},

					split : function(expression) {
						var expressions = [];
						expression.scan(
								/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/,
								function(m) {
									expressions.push(m[1].strip());
								});
						return expressions;
					},

					matchElements : function(elements, expression) {
						var matches = $$(expression), h = Selector.handlers;
						h.mark(matches);
						for ( var i = 0, results = [], element; element = elements[i]; i++)
							if (element._countedByPrototype)
								results.push(element);
						h.unmark(matches);
						return results;
					},

					findElement : function(elements, expression, index) {
						if (Object.isNumber(expression)) {
							index = expression;
							expression = false;
						}
						return Selector.matchElements(elements,
								expression || '*')[index || 0];
					},

					findChildElements : function(element, expressions) {
						expressions = Selector.split(expressions.join(','));
						var results = [], h = Selector.handlers;
						for ( var i = 0, l = expressions.length, selector; i < l; i++) {
							selector = new Selector(expressions[i].strip());
							h.concat(results, selector.findElements(element));
						}
						return (l > 1) ? h.unique(results) : results;
					}
				});

if (Prototype.Browser.IE) {
	Object.extend(Selector.handlers, {
		concat : function(a, b) {
			for ( var i = 0, node; node = b[i]; i++)
				if (node.tagName !== "!")
					a.push(node);
			return a;
		}
	});
}

function $$() {
	return Selector.findChildElements(document, $A(arguments));
}

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;

		var data = elements
				.inject(
						{},
						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)))) {
									if (key in result) {
										if (!Object.isArray(result[key]))
											result[key] = [ result[key] ];
										result[key].push(value);
									} else
										result[key] = value;
								}
							}
							return result;
						});

		return options.hash ? data : Object.toQueryString(data);
	}
};

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

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

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

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

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

	selectMany : function(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(this.optionValue(opt));
		}
		return values;
	},

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

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

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 _isButton;
	if (Prototype.Browser.IE) {
		var buttonMap = {
			0 : 1,
			1 : 4,
			2 : 2
		};
		_isButton = function(event, code) {
			return event.button === buttonMap[code];
		};
	} else if (Prototype.Browser.WebKit) {
		_isButton = function(event, code) {
			switch (code) {
			case 0:
				return event.which == 1 && !event.metaKey;
			case 1:
				return event.which == 1 && event.metaKey;
			default:
				return false;
			}
		};
	} else {
		_isButton = function(event, code) {
			return event.which ? (event.which === code + 1)
					: (event.button === code);
		};
	}

	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;
		var elements = [ element ].concat(element.ancestors());
		return Selector.findElement(elements, expression, 0);
	}

	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 (Prototype.Browser.IE) {
		function _relatedTarget(event) {
			var element;
			switch (event.type) {
			case 'mouseover':
				element = event.fromElement;
				break;
			case 'mouseout':
				element = event.toElement;
				break;
			default:
				return null;
			}
			return Element.extend(element);
		}

		Object.extend(methods, {
			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 (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
			});

			return Object.extend(event, methods);
		};
	} else {
		Event.prototype = window.Event.prototype
				|| document.createEvent('HTMLEvents').__proto__;
		Object.extend(Event.prototype, methods);
		Event.extend = Prototype.K;
	}

	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;

	if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
		_getDOMEventName = function(eventName) {
			var translations = {
				mouseenter : "mouseover",
				mouseleave : "mouseout"
			};
			return eventName in translations ? 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("onfilterchange", 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 (Object.isUndefined(registry))
			return element;

		if (eventName && !handler) {
			var responders = registry.get(eventName);

			if (Object.isUndefined(responders))
				return element;

			responders.each(function(r) {
				Element.stopObserving(element, eventName, r.handler);
			});
			return element;
		} else if (!eventName) {
			registry.each(function(pair) {
				var eventName = pair.key, responders = pair.value;

				responders.each(function(r) {
					Element.stopObserving(element, eventName, r.handler);
				});
			});
			return element;
		}

		var responders = registry.get(eventName);

		if (!responders)
			return;

		var responder = responders.find(function(r) {
			return r.handler === handler;
		});
		if (!responder)
			return element;

		var actualEventName = _getDOMEventName(eventName);

		if (eventName.include(':')) {
			if (element.removeEventListener)
				element.removeEventListener("dataavailable", responder, false);
			else {
				element.detachEvent("ondataavailable", responder);
				element.detachEvent("onfilterchange", responder);
			}
		} else {
			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', true, true);
		} else {
			event = document.createEventObject();
			event.eventType = bubble ? 'ondataavailable' : 'onfilterchange';
		}

		event.eventName = eventName;
		event.memo = memo || {};

		if (document.createEvent)
			element.dispatchEvent(event);
		else
			element.fireEvent(event.eventType, event);

		return Event.extend(event);
	}

	Object.extend(Event, Event.Methods);

	Object.extend(Event, {
		fire : fire,
		observe : observe,
		stopObserving : stopObserving
	});

	Element.addMethods( {
		fire : fire,

		observe : observe,

		stopObserving : stopObserving
	});

	Object.extend(document, {
		fire : fire.methodize(),

		observe : observe.methodize(),

		stopObserving : stopObserving.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);

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