/*  Prototype JavaScript framework, version 1.6.0_rc0
*  (c) 2005-2007 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: '1.6.0_rc0',

	Browser: {
		IE: !!(window.attachEvent && !window.opera),
		Opera: !!window.opera,
		WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
		Gecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
		MobileSafari: !!navigator.userAgent.match(/iPhone.*Mobile.*Safari/)
	},

	BrowserFeatures: {
		XPath: !!document.evaluate,
		ElementExtensions: !!window.HTMLElement,
		SpecificElementExtensions:
      document.createElement('div').__proto__ !==
       document.createElement('form').__proto__
	},

	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;

/* Based on Alex Arnell's inheritance implementation. */
var Class = {
	create: function(parent, methods)
	{
		if (arguments.length == 1 && !Object.isFunction(parent))
			methods = parent, parent = null;

		var method = function()
		{
			if (!Class.extending) this.initialize.apply(this, arguments);
		};

		method.superclass = parent;
		method.subclasses = [];

		if (Object.isFunction(parent))
		{
			Class.extending = true;
			method.prototype = new parent();

			parent.subclasses.push(method);

			delete Class.extending;
		}

		if (methods) Class.extend(method, methods);
		method.prototype.constructor = method;

		return method;
	},

	extend: function(destination, source)
	{
		for (var name in source) Class.inherit(destination, source, name);
		return destination;
	},

	inherit: function(destination, source, name)
	{
		var prototype = destination.prototype, ancestor = prototype[name],
     descendant = source[name];
		if (ancestor && Object.isFunction(descendant) &&
        descendant.argumentNames().first() == "$super")
		{
			var method = descendant, descendant = ancestor.wrap(method);
			Object.extend(descendant, {
				valueOf: function() { return method },
				toString: function() { return method.toString() }
			});
		}

		prototype[name] = descendant;

		if (destination.subclasses && destination.subclasses.length > 0)
		{
			for (var i = 0, subclass; subclass = destination.subclasses[i]; i++)
			{
				Class.extending = true;
				Object.extend(subclass.prototype, new destination());
				subclass.prototype.constructor = subclass;
				delete Class.extending;
				Class.inherit(subclass, destination.prototype, name);
			}
		}
	},

	mixin: function(destination, source)
	{
		return Object.extend(destination, source);
	}
};

var Abstract = {};

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

Object.extend(Object, {
	inspect: function(object)
	{
		try
		{
			if (object === undefined) return 'undefined';
			if (object === null) return 'null';
			return object.inspect ? object.inspect() : object.toString();
		} catch (e)
		{
			if (e instanceof RangeError) return '...';
			throw e;
		}
	},

	toJSON: function(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 (Object.isElement(object)) return;

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

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

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

	keys: function(object)
	{
		var keys = [];
		for (var property in object)
			keys.push(property);
		return keys;
	},

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

	clone: function(object)
	{
		return Object.extend({}, object);
	},

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

	isArray: function(object)
	{
		return object && object.constructor === Array;
	},

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

	isString: function(object)
	{
		return typeof object == "string";
	},

	isNumber: function(object)
	{
		return typeof object == "number";
	},

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

Object.extend(Function.prototype, {
	argumentNames: function()
	{
		var names = this.toString().match(/^[\s\(]*function\s*\((.*?)\)/)[1].split(",").invoke("strip");
		return names.length == 1 && !names[0] ? [] : names;
	},

	bind: function()
	{
		if (arguments.length < 2 && arguments[0] === undefined) return this;
		var __method = this, args = $A(arguments), object = args.shift();
		return function()
		{
			return __method.apply(object, args.concat($A(arguments)));
		}
	},

	bindAsEventListener: function()
	{
		var __method = this, args = $A(arguments), object = args.shift();
		return function(event)
		{
			return __method.apply(object, [event || window.event].concat(args));
		}
	},

	curry: function()
	{
		if (!arguments.length) return this;
		var __method = this, args = $A(arguments);
		return function()
		{
			return __method.apply(this, args.concat($A(arguments)));
		}
	},

	delay: function()
	{
		var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
		return window.setTimeout(function()
		{
			return __method.apply(__method, args);
		}, timeout);
	},

	wrap: function(wrapper)
	{
		var __method = this;
		return function()
		{
			return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
		}
	},

	methodize: function()
	{
		if (this._methodized) return this._methodized;
		var __method = this;
		return this._methodized = function()
		{
			return __method.apply(null, [this].concat($A(arguments)));
		};
	}
});

Function.prototype.defer = Function.prototype.delay.curry(0.01);

Date.prototype.toJSON = function()
{
	return '"' + this.getFullYear() + '-' +
    (this.getMonth() + 1).toPaddedString(2) + '-' +
    this.getDate().toPaddedString(2) + 'T' +
    this.getHours().toPaddedString(2) + ':' +
    this.getMinutes().toPaddedString(2) + ':' +
    this.getSeconds().toPaddedString(2) + '"';
};

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;
	}
};

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);
	},

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

	onTimerEvent: function()
	{
		if (!this.currentlyExecuting)
		{
			try
			{
				this.currentlyExecuting = true;
				this.callback(this);
			} finally
			{
				this.currentlyExecuting = false;
			}
		}
	}
});
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, {
	gsub: function(pattern, replacement)
	{
		var result = '', source = this, match;
		replacement = arguments.callee.prepareReplacement(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;
	},

	sub: function(pattern, replacement, count)
	{
		replacement = this.gsub.prepareReplacement(replacement);
		count = count === undefined ? 1 : count;

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

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

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

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

	stripTags: function()
	{
		return this.replace(/<\/?[^>]+>/gi, '');
	},

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

	extractScripts: function()
	{
		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];
		});
	},

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

	escapeHTML: function()
	{
		var self = arguments.callee;
		self.text.data = this;
		return self.div.innerHTML;
	},

	unescapeHTML: function()
	{
		var div = new Element('div');
		div.innerHTML = this.stripTags();
		return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo + node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
	},

	toQueryParams: function(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;
		});
	},

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

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

	times: function(count)
	{
		var result = '';
		for (var i = 0; i < count; i++) result += this;
		return result;
	},

	camelize: function()
	{
		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;
	},

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

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

	dasherize: function()
	{
		return this.gsub(/_/, '-');
	},

	inspect: function(useDoubleQuotes)
	{
		var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match)
		{
			var character = String.specialChar[match[0]];
			return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
		});
		if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
		return "'" + escapedString.replace(/'/g, '\\\'') + "'";
	},

	toJSON: function()
	{
		return this.inspect(true);
	},

	unfilterJSON: function(filter)
	{
		return this.sub(filter || Prototype.JSONFilter, '#{1}');
	},

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

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

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

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

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

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

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

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

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
	escapeHTML: function()
	{
		return this.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
	},
	unescapeHTML: function()
	{
		return this.replace(/&amp;/g, '&').replace(/&lt;/g, '<').replace(/&gt;/g, '>');
	}
});

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

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
	div: document.createElement('div'),
	text: document.createTextNode('')
});

with (String.prototype.escapeHTML) div.appendChild(text);

var Template = Class.create();
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
Template.prototype = {
	initialize: function(template, pattern)
	{
		this.template = template.toString();
		this.pattern = pattern || Template.Pattern;
	},

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

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

			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 '';

			while (match != null)
			{
				var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : 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);
		} .bind(this));
	}
};

var $break = {};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	zip: function()
	{
		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));
		});
	},

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

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

Object.extend(Enumerable, {
	map: Enumerable.collect,
	find: Enumerable.detect,
	select: Enumerable.findAll,
	filter: Enumerable.findAll,
	member: Enumerable.include,
	entries: Enumerable.toArray,
	every: Enumerable.all,
	some: Enumerable.any
});
function $A(iterable)
{
	if (!iterable) return [];
	if (iterable.toArray) return iterable.toArray();
	else
	{
		var results = [];
		for (var i = 0, length = iterable.length; i < length; i++)
			results.push(iterable[i]);
		return results;
	}
}

if (Prototype.Browser.WebKit)
{
	function $A(iterable)
	{
		if (!iterable) return [];
		if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
        iterable.toArray)
		{
			return iterable.toArray();
		} else
		{
			var results = [];
			for (var i = 0, length = iterable.length; i < length; i++)
				results.push(iterable[i]);
			return results;
		}
	}
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
	_each: function(iterator)
	{
		for (var i = 0, length = this.length; i < length; i++)
			iterator(this[i]);
	},

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

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

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

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

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

	without: function()
	{
		var values = $A(arguments);
		return this.select(function(value)
		{
			return !values.include(value);
		});
	},

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

	reduce: function()
	{
		return this.length > 1 ? this : this[0];
	},

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

	intersect: function(array)
	{
		return this.uniq().findAll(function(item)
		{
			return array.include(item);
		});
	},

	clone: function()
	{
		return [].concat(this);
	},

	size: function()
	{
		return this.length;
	},

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

	toJSON: function()
	{
		var results = [];
		this.each(function(object)
		{
			var value = Object.toJSON(object);
			if (value !== undefined) results.push(value);
		});
		return '[' + results.join(', ') + ']';
	}
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
	Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(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;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(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;
};

Array.prototype.toArray = Array.prototype.clone;

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

if (Prototype.Browser.Opera)
{
	Array.prototype.concat = function()
	{
		var array = [];
		for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
		for (var i = 0, length = arguments.length; i < length; i++)
		{
			if (Object.isArray(arguments[i]))
			{
				for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
					array.push(arguments[i][j]);
			} else
			{
				array.push(arguments[i]);
			}
		}
		return array;
	};
}
Object.extend(Number.prototype, {
	toColorPart: function()
	{
		return this.toPaddedString(2, 16);
	},

	succ: function()
	{
		return this + 1;
	},

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

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

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

$w('abs round ceil floor').each(function(method)
{
	Number.prototype[method] = Math[method].methodize();
});
var Hash = function(object)
{
	if (object instanceof Hash) this.merge(object);
	else Object.extend(this, object || {});
};

Object.extend(Hash, {
	toQueryString: function(obj)
	{
		var parts = [];
		parts.add = arguments.callee.addPair;

		this.prototype._each.call(obj, function(pair)
		{
			if (!pair.key) return;
			var value = pair.value;

			if (value && typeof value == 'object')
			{
				if (Object.isArray(value)) value.each(function(value)
				{
					parts.add(pair.key, value);
				});
				return;
			}
			parts.add(pair.key, value);
		});

		return parts.join('&');
	},

	toJSON: function(object)
	{
		var results = [];
		this.prototype._each.call(object, function(pair)
		{
			var value = Object.toJSON(pair.value);
			if (value !== undefined) results.push(pair.key.toJSON() + ': ' + value);
		});
		return '{' + results.join(', ') + '}';
	}
});

Hash.toQueryString.addPair = function(key, value, prefix)
{
	key = encodeURIComponent(key);
	if (value === undefined) this.push(key);
	else this.push(key + '=' + (value == null ? '' : encodeURIComponent(value)));
};

Object.extend(Hash.prototype, Enumerable);
Object.extend(Hash.prototype, {
	_each: function(iterator)
	{
		for (var key in this)
		{
			var value = this[key];
			if (value && value == Hash.prototype[key]) continue;

			var pair = [key, value];
			pair.key = key;
			pair.value = value;
			iterator(pair);
		}
	},

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

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

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

	merge: function(hash)
	{
		return $H(hash).inject(this, function(mergedHash, pair)
		{
			mergedHash[pair.key] = pair.value;
			return mergedHash;
		});
	},

	remove: function()
	{
		var result;
		for (var i = 0, length = arguments.length; i < length; i++)
		{
			var value = this[arguments[i]];
			if (value !== undefined)
			{
				if (result === undefined) result = value;
				else
				{
					if (!Object.isArray(result)) result = [result];
					result.push(value);
				}
			}
			delete this[arguments[i]];
		}
		return result;
	},

	toQueryString: function()
	{
		return Hash.toQueryString(this);
	},

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

	toJSON: function()
	{
		return Hash.toJSON(this);
	}
});

function $H(object)
{
	if (object instanceof Hash) return object;
	return new Hash(object);
};

// Safari iterates over shadowed properties
if (function()
{
	var i = 0, Test = function(value) { this.key = value };
	Test.prototype.key = 'foo';
	for (var property in new Test('bar')) i++;
	return i > 1;
} ()) Hash.prototype._each = function(iterator)
{
	var cache = [];
	for (var key in this)
	{
		var value = this[key];
		if ((value && value == Hash.prototype[key]) || cache.include(key)) continue;
		cache.push(key);
		var pair = [key, value];
		pair.key = key;
		pair.value = value;
		iterator(pair);
	}
};
ObjectRange = Class.create();
Object.extend(ObjectRange.prototype, Enumerable);
Object.extend(ObjectRange.prototype, {
	initialize: function(start, end, exclusive)
	{
		this.start = start;
		this.end = end;
		this.exclusive = exclusive;
	},

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

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

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

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 = function() { };
Ajax.Base.prototype = {
	setOptions: 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();
	}
};

Ajax.Request = Class.create();
Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
	_complete: false,

	initialize: function(url, options)
	{
		this.transport = Ajax.getTransport();
		this.setOptions(options);
		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))
		{
			// simulate other verbs over post
			params['_method'] = this.method;
			this.method = 'post';
		}

		this.parameters = params;

		if (params = Hash.toQueryString(params))
		{
			// when GET, append parameters to URL
			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';
		}

		// user-defined headers
		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 && 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')
		{
			// avoid memory leak in MSIE: clean up
			this.transport.onreadystatechange = Prototype.emptyFunction;
		}
	},

	getHeader: function(name)
	{
		try
		{
			return this.transport.getResponseHeader(name);
		} 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.Response = Class.create();
Ajax.Response.prototype = {
	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 = xml === undefined ? 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');
		try
		{
			return json ? json.evalJSON(this.request.options.sanitizeJSON) : null;
		} catch (e)
		{
			this.request.dispatchException(e);
		}
	},

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

Ajax.Updater = Class.create();

Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
	initialize: function(container, url, options)
	{
		this.container = {
			success: (container.success || container),
			failure: (container.failure || (container.success ? null : container))
		};

		this.transport = Ajax.getTransport();
		this.setOptions(options);

		var onComplete = this.options.onComplete || Prototype.emptyFunction;
		this.options.onComplete = (function(response, param)
		{
			this.updateContent(response.responseText);
			onComplete(response, param);
		}).bind(this);

		this.request(url);
	},

	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);
		}

		if (this.success())
		{
			if (this.onComplete) this.onComplete.bind(this).defer();
		}
	}
});

Ajax.PeriodicalUpdater = Class.create();
Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
	initialize: function(container, url, options)
	{
		this.setOptions(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(responseText)
	{
		if (this.options.decay)
		{
			this.decay = (responseText == this.lastText ?
        this.decay * this.options.decay : 1);

			this.lastText = 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(query.snapshotItem(i));
		return results;
	};
}

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

if (!window.Node)
	var 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()
{
	var element = this.Element;
	this.Element = function(tagName, attributes)
	{
		attributes = attributes || {};
		tagName = tagName.toLowerCase();
		var cache = Element.cache;
		if (Prototype.Browser.IE && 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(this.Element, element || {});
}).call(window);

Element.cache = {};

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).style.display = 'none';
		return element;
	},

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

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

	update: function(element, content)
	{
		element = $(element);
		if (content && content.toElement) content = content.toElement();
		if (Object.isElement(content)) return element.update().insert(content);
		content = Object.toHTML(content);
		element.innerHTML = content.stripScripts();
		content.evalScripts.bind(content).defer();
		return element;
	},

	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, t, range;

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

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

			content = Object.toHTML(content);

			range = element.ownerDocument.createRange();
			t.initializeRange(element, range);
			t.insert(element, range.createContextualFragment(content.stripScripts()));

			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 element;
	},

	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('parentNode');
	},

	descendants: function(element)
	{
		return $A($(element).getElementsByTagName('*')).each(Element.extend);
	},

	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('previousSibling');
	},

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

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

	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();
		return expression ? Selector.findElement(ancestors, expression, index) :
      ancestors[index || 0];
	},

	down: function(element, expression, index)
	{
		element = $(element);
		if (arguments.length == 1) return element.firstDescendant();
		var descendants = element.descendants();
		return expression ? Selector.findElement(descendants, expression, index) :
      descendants[index || 0];
	},

	previous: function(element, expression, index)
	{
		element = $(element);
		if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
		var previousSiblings = element.previousSiblings();
		return expression ? Selector.findElement(previousSiblings, expression, index) :
      previousSiblings[index || 0];
	},

	next: function(element, expression, index)
	{
		element = $(element);
		if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
		var nextSiblings = element.nextSiblings();
		return expression ? Selector.findElement(nextSiblings, expression, index) :
      nextSiblings[index || 0];
	},

	select: function()
	{
		var args = $A(arguments), element = $(args.shift());
		return Selector.findChildElements(element, args);
	},

	adjacent: function()
	{
		var args = $A(arguments), element = $(args.shift());
		return Selector.findChildElements(element.parentNode, args).without(element);
	},

	identify: function(element)
	{
		element = $(element);
		var id = element.readAttribute('id'), self = arguments.callee;
		if (id) return id;
		do { id = 'anonymous_element_' + self.counter++ } while ($(id));
		element.writeAttribute('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] = value === undefined ? true : value;

		for (var attr in attributes)
		{
			var 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().height;
	},

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

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

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

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

	// removes whitespace-only text node children
	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);
		while (element = element.parentNode)
			if (element == ancestor) return true;
		return false;
	},

	scrollTo: function(element)
	{
		element = $(element);
		var pos = element.cumulativeOffset();
		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)
		{
			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') ?
          (elementStyle.styleFloat === undefined ? '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('display');
		if (display != 'none' && display != null) // Safari bug
			return { width: element.offsetWidth, height: element.offsetHeight };

		// All *Width and *Height properties give 0 on elements with display none,
		// so enable the element temporarily
		var els = element.style;
		var originalVisibility = els.visibility;
		var originalPosition = els.position;
		var originalDisplay = els.display;
		els.visibility = 'hidden';
		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';
			// Opera returns the offset relative to the positioning context, when an
			// element is position relative but top and left have not been defined
			if (window.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.style.overflow || 'auto';
		if ((Element.getStyle(element, 'overflow') || 'visible') != '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 == 'BODY') break;
				var p = Element.getStyle(element, 'position');
				if (p == 'relative' || p == 'absolute') break;
			}
		} while (element);
		return Element._returnOffset(valueL, valueT);
	},

	absolutize: function(element)
	{
		element = $(element);
		if (element.getStyle('position') == 'absolute') return;
		// Position.prepare(); // To be done manually by Scripty when it needs it.

		var offsets = element.positionedOffset();
		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('position') == 'relative') return;
		// Position.prepare(); // To be done manually by Scripty when it needs it.

		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;

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

		} while (element = element.offsetParent);

		element = forElement;
		do
		{
			if (!Prototype.Browser.Opera || element.tagName == '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] || {});

		// find page position of source
		source = $(source);
		var p = source.viewportOffset();

		// find coordinate system to use
		element = $(element);
		var delta = [0, 0];
		var parent = null;
		// delta [0,0] will do fine with position: fixed elements,
		// position:absolute needs offsetParent deltas
		if (Element.getStyle(element, 'position') == 'absolute')
		{
			parent = element.getOffsetParent();
			delta = parent.viewportOffset();
		}

		// correct by body offsets (fixes Safari)
		if (parent == document.body)
		{
			delta[0] -= document.body.offsetLeft;
			delta[1] -= document.body.offsetTop;
		}

		// set position
		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;
	}
};

Element.Methods.identify.counter = 1;

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);

Object.extend(Element.Methods, {
	getElementsBySelector: Element.Methods.select,
	childElements: Element.Methods.immediateDescendants
});

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


if (!document.createRange || Prototype.Browser.Opera)
{
	Element.Methods.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 t = Element._insertionTranslations, content, position, pos, tagName;

		for (position in insertions)
		{
			content = insertions[position];
			position = position.toLowerCase();
			pos = t[position];

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

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

			if (t.tags[tagName])
			{
				var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
				if (position == 'top' || position == 'after') fragments.reverse();
				fragments.each(pos.insert.curry(element));
			}
			else element.insertAdjacentHTML(pos.adjacency, content.stripScripts());

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

		return element;
	};
}

if (Prototype.Browser.Opera)
{
	Element.Methods._getStyle = Element.Methods.getStyle;
	Element.Methods.getStyle = function(element, style)
	{
		switch (style)
		{
			case 'left':
			case 'top':
			case 'right':
			case 'bottom':
				if (Element._getStyle(element, 'position') == 'static') return null;
			default: return Element._getStyle(element, style);
		}
	};
	Element.Methods._readAttribute = Element.Methods.readAttribute;
	Element.Methods.readAttribute = function(element, attribute)
	{
		if (attribute == 'title') return element.title;
		return Element._readAttribute(element, attribute);
	};
}

else if (Prototype.Browser.IE)
{
	$w('positionedOffset getOffsetParent viewportOffset').each(function(method)
	{
		Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element)
      {
      	element = $(element);
      	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;
      }
    );
	});

	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 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 = {
		read: {
			names: {
				'class': 'className',
				'for': 'htmlFor'
			},
			values: {
				_getAttr: function(element, attribute)
				{
					return element.getAttribute(attribute, 2);
				},
				_getAttrNode: function(element, attribute)
				{
					var node = element.getAttributeNode(attribute);
					return node ? node.value : "";
				},
				_getEv: function(element, attribute)
				{
					var attribute = element.getAttribute(attribute);
					return attribute ? attribute.toString().slice(23, -2) : null;
				},
				_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.clone(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').each(function(attr)
      {
      	Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
      	Element._attributeTranslations.has[attr.toLowerCase()] = attr;
      });

	(function(v)
	{
		Object.extend(v, {
			href: v._getAttr,
			src: v._getAttr,
			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);
}

else if (Prototype.Browser.Gecko)
{
	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 == 'IMG' && element.width)
		{
			element.width++; element.width--;
		} else try
		{
			var n = document.createTextNode(' ');
			element.appendChild(n);
			element.removeChild(n);
		} catch (e) { }

		return element;
	};

	// Safari returns margins on body which is incorrect if the child is absolutely
	// positioned.  For performance reasons, redefine Position.cumulativeOffset for
	// KHTML/WebKit only.
	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 (Prototype.Browser.IE || Prototype.Browser.Opera)
{
	// IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
	Element.Methods.update = function(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 in Element._insertionTranslations.tags)
		{
			$A(element.childNodes).each(function(node) { element.removeChild(node) });
			Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
		}
		else element.innerHTML = content.stripScripts();

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

if (document.createElement('div').outerHTML)
{
	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];
	div.innerHTML = t[0] + html + t[1];
	t[2].times(function() { div = div.firstChild });
	return $A(div.childNodes);
};

Element._insertionTranslations = {
	before: {
		adjacency: 'beforeBegin',
		insert: function(element, node)
		{
			element.parentNode.insertBefore(node, element);
		},
		initializeRange: function(element, range)
		{
			range.setStartBefore(element);
		}
	},
	top: {
		adjacency: 'afterBegin',
		insert: function(element, node)
		{
			element.insertBefore(node, element.firstChild);
		},
		initializeRange: function(element, range)
		{
			range.selectNodeContents(element);
			range.collapse(true);
		}
	},
	bottom: {
		adjacency: 'beforeEnd',
		insert: function(element, node)
		{
			element.appendChild(node);
		}
	},
	after: {
		adjacency: 'afterEnd',
		insert: function(element, node)
		{
			element.parentNode.insertBefore(node, element.nextSibling);
		},
		initializeRange: function(element, range)
		{
			range.setStartAfter(element);
		}
	},
	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()
{
	this.bottom.initializeRange = this.top.initializeRange;
	Object.extend(this.tags, {
		THEAD: this.tags.TBODY,
		TFOOT: this.tags.TBODY,
		TH: this.tags.TD
	});
}).call(Element._insertionTranslations);

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);

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

Element.extend = (function()
{
	if (Prototype.BrowserFeatures.SpecificElementExtensions)
		return Prototype.K;

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

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

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

		// extend methods for specific tags
		if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

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

		element._extendedByPrototype = Prototype.emptyFunction;
		return element;

	}, {
		refresh: function()
		{
			// extend methods for all tags (Safari doesn't need this)
			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];

		window[klass] = {};
		window[klass].prototype = document.createElement(tagName).__proto__;
		return window[klass];
	}

	if (F.ElementExtensions)
	{
		copy(Element.Methods, HTMLElement.prototype);
		copy(Element.Methods.Simulated, HTMLElement.prototype, 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()
	{
		var dimensions = {};
		$w('width height').each(function(d)
		{
			var D = d.capitalize();
			dimensions[d] = self['inner' + D] ||
       (document.documentElement['client' + D] || document.body['client' + D]);
		});
		return dimensions;
	},

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

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

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

Selector.prototype = {
	initialize: function(expression)
	{
		this.expression = expression.strip();
		this.compileMatcher();
	},

	compileMatcher: function()
	{
		// Selectors with namespaced attributes can't use the XPath version
		if (Prototype.BrowserFeatures.XPath && !(/\[[\w-]*?:/).test(this.expression))
			return this.compileXPathMatcher();

		var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

		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 in ps)
			{
				p = ps[i];
				if (m = e.match(p))
				{
					this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
    	      new Template(c[i]).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;

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

		this.matcher = ['.//*'];
		while (e && le != e && (/\S/).test(e))
		{
			le = e;
			for (var i in ps)
			{
				if (m = e.match(ps[i]))
				{
					this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).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;
		if (this.xpath) return document._getElementsByXPath(this.xpath, root);
		return this.matcher(root);
	},

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

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

		while (e && le !== e && (/\S/).test(e))
		{
			le = e;
			for (var i in ps)
			{
				p = ps[i];
				if (m = e.match(p))
				{
					// use the Selector.assertions methods unless the selector
					// is too complex.
					if (as[i])
					{
						this.tokens.push([i, Object.clone(m)]);
						e = e.replace(m[0], '');
					} else
					{
						// reluctantly do a document-wide search
						// and look for a match in the array
						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() + ">";
	}
};

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: "[@#{1}]",
		attr: function(m)
		{
			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 or translate(text(), ' \t\r\n', '') = '')]",
			'checked': "[@checked]",
			'disabled': "[@disabled]",
			'enabled': "[not(@disabled)]",
			'not': function(m)
			{
				var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, m, v;

				var exclusion = [];
				while (e && le != e && (/\S/).test(e))
				{
					le = e;
					for (var i in p)
					{
						if (m = e.match(p[i]))
						{
							v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).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 = false;',
		attr: function(m)
		{
			m[3] = (m[5] || m[6]);
			return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); 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: {
		// combinators must be listed first
		// (and descendant needs to be last combinator)
		laterSibling: /^\s*~\s*/,
		child: /^\s*>\s*/,
		adjacent: /^\s*\+\s*/,
		descendant: /^\s/,

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

	// for Selector.match and Element#match
	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 Selector.operators[matches[2]](nodeValue, matches[3]);
		}
	},

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

		// marks an array of nodes for counting
		mark: function(nodes)
		{
			for (var i = 0, node; node = nodes[i]; i++)
				node._counted = true;
			return nodes;
		},

		unmark: function(nodes)
		{
			for (var i = 0, node; node = nodes[i]; i++)
				node._counted = undefined;
			return nodes;
		},

		// mark each child node with its position (for nth calls)
		// "ofType" flag indicates whether we're indexing for nth-of-type
		// rather than nth-child
		index: function(parentNode, reverse, ofType)
		{
			parentNode._counted = true;
			if (reverse)
			{
				for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--)
				{
					node = nodes[i];
					if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
				}
			} else
			{
				for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
					if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
			}
		},

		// filters out duplicates and extends all nodes
		unique: function(nodes)
		{
			if (nodes.length == 0) return nodes;
			var results = [], n;
			for (var i = 0, l = nodes.length; i < l; i++)
				if (!(n = nodes[i])._counted)
			{
				n._counted = true;
				results.push(Element.extend(n));
			}
			return Selector.handlers.unmark(results);
		},

		// COMBINATOR FUNCTIONS
		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, children = [], 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;
		},

		// TOKEN FUNCTIONS
		tagName: function(nodes, root, tagName, combinator)
		{
			tagName = tagName.toUpperCase();
			var results = [], h = Selector.handlers;
			if (nodes)
			{
				if (combinator)
				{
					// fastlane for ordinary descendant combinators
					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() == tagName) results.push(node);
				return results;
			} else return root.getElementsByTagName(tagName);
		},

		id: function(nodes, root, id, combinator)
		{
			var targetNode = $(id), h = Selector.handlers;
			if (!targetNode) return [];
			if (!nodes && root == document) return [targetNode];
			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)
		{
			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)
		{
			if (!nodes) nodes = root.getElementsByTagName("*");
			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);
		},

		// handles the an+b logic
		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;
			});
		},

		// handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
		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._counted)
				{
					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++)
			{
				// IE treats comments as element nodes
				if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) 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._counted) 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) 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.startsWith(v); },
		'$=': function(nv, v) { return nv.endsWith(v); },
		'*=': function(nv, v) { return nv.include(v); },
		'~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
		'|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
	},

	matchElements: function(elements, expression)
	{
		var matches = new Selector(expression).findElements(), h = Selector.handlers;
		h.mark(matches);
		for (var i = 0, results = [], element; element = elements[i]; i++)
			if (element._counted) 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)
	{
		var exprs = expressions.join(','), expressions = [];
		exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m)
		{
			expressions.push(m[1].strip());
		});
		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;
	}
});

function $$()
{
	return Selector.findChildElements(document, $A(arguments));
}
var Form = {
	reset: function(form)
	{
		$(form).reset();
		return form;
	},

	serializeElements: function(elements, options)
	{
		if (typeof options != 'object') options = { hash: !!options };
		else if (options.hash === undefined) 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 != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true))))
				{
					if (key in result)
					{
						// a key is already present; construct an array of values
						if (!Object.isArray(result[key])) result[key] = [result[key]];
						result[key].push(value);
					}
					else result[key] = value;
				}
			}
			return result;
		});

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

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

	getElements: function(form)
	{
		return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child)
      {
      	if (Form.Element.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'].include(element.tagName.toLowerCase());
		});
	},

	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 Hash.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'].include(element.type)))
				element.select();
		} catch (e) { }
		return element;
	},

	disable: function(element)
	{
		element = $(element);
		element.blur();
		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 (value === undefined) return element.checked ? element.value : null;
		else element.checked = !!value;
	},

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

	select: function(element, index)
	{
		if (index === undefined)
			return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
		else
		{
			var opt, value, single = !Object.isArray(index);
			for (var i = 0, length = element.length; i < length; i++)
			{
				opt = element.options[i];
				value = this.optionValue(opt);
				if (single)
				{
					if (value == index)
					{
						opt.selected = true;
						return;
					}
				}
				else opt.selected = index.include(value);
			}
		}
	},

	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)
	{
		// extend element because hasAttribute may not be native
		return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
	}
};

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

Abstract.TimedObserver = function() { };
Abstract.TimedObserver.prototype = {
	initialize: function(element, frequency, callback)
	{
		this.frequency = frequency;
		this.element = $(element);
		this.callback = callback;

		this.lastValue = this.getValue();
		this.registerCallback();
	},

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

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

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

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

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

Abstract.EventObserver = function() { };
Abstract.EventObserver.prototype = {
	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.bind(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();
Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
	getValue: function()
	{
		return Form.Element.getValue(this.element);
	}
});

Form.EventObserver = Class.create();
Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
	getValue: function()
	{
		return Form.serialize(this.element);
	}
});
if (!window.Event) var Event = {};

Object.extend(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,

	DOMEvents: ['click', 'dblclick', 'mousedown', 'mouseup', 'mouseover',
              'mousemove', 'mouseout', 'keypress', 'keydown', 'keyup',
              'load', 'unload', 'abort', 'error', 'resize', 'scroll',
              'select', 'change', 'submit', 'reset', 'focus', 'blur'],

	cache: {},

	relatedTarget: function(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);
	}
});

Event.Methods = {
	element: function(event)
	{
		var node = event.target;
		return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
	},

	findElement: function(event, expression)
	{
		var element = Event.element(event);
		return element.match(expression) ? element : element.up(expression);
	},

	isLeftClick: function(event)
	{
		return (((event.which) && (event.which == 1)) ||
            ((event.button) && (event.button == 1)));
	},

	pointer: function(event)
	{
		return {
			x: event.pageX || (event.clientX +
        (document.documentElement.scrollLeft || document.body.scrollLeft)),
			y: event.pageY || (event.clientY +
        (document.documentElement.scrollTop || document.body.scrollTop))
		};
	},

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

	stop: function(event)
	{
		event.preventDefault();
		event.stopPropagation();
	}
};

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

	if (Prototype.Browser.IE)
	{
		Object.extend(methods, {
			stopPropagation: function() { this.cancelBubble = true },
			preventDefault: function() { this.returnValue = false },
			inspect: function() { return "[object Event]" }
		});

		return function(event)
		{
			if (!event) return false;
			if (event._extendedByPrototype) return event;

			event._extendedByPrototype = Prototype.emptyFunction;
			var pointer = Event.pointer(event);
			Object.extend(event, {
				target: event.srcElement,
				relatedTarget: Event.relatedTarget(event),
				pageX: pointer.x,
				pageY: pointer.y
			});
			return Object.extend(event, methods);
		};

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

Object.extend(Event, (function()
{
	var cache = Event.cache;

	function getEventID(element)
	{
		if (element._eventID) return element._eventID;
		arguments.callee.id = arguments.callee.id || 1;
		return element._eventID = ++arguments.callee.id;
	}

	function getDOMEventName(eventName)
	{
		if (!Event.DOMEvents.include(eventName)) return "dataavailable";
		return { keypress: "keydown"}[eventName] || eventName;
	}

	function getCacheForID(id)
	{
		return cache[id] = cache[id] || {};
	}

	function getWrappersForEventName(id, eventName)
	{
		var c = getCacheForID(id);
		return c[eventName] = c[eventName] || [];
	}

	function createWrapper(id, eventName, handler)
	{
		var c = getWrappersForEventName(id, eventName);
		if (c.pluck("handler").include(handler)) return false;

		var wrapper = function(event)
		{
			if (event.eventName && event.eventName != eventName)
				return false;

			Event.extend(event);
			handler.call(event.target, event);
		};

		wrapper.handler = handler;
		c.push(wrapper);
		return wrapper;
	}

	function findWrapper(id, eventName, handler)
	{
		var c = getWrappersForEventName(id, eventName);
		return c.find(function(wrapper) { return wrapper.handler == handler });
	}

	function destroyWrapper(id, eventName, handler)
	{
		var c = getCacheForID(id);
		if (!c[eventName]) return false;
		c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
	}

	function destroyCache()
	{
		for (var id in cache)
			for (var eventName in cache[id])
			cache[id][eventName] = null;
	}

	if (window.attachEvent)
	{
		window.attachEvent("onunload", destroyCache);
	}

	return {
		observe: function(element, eventName, handler)
		{
			element = $(element);
			var id = getEventID(element), name = getDOMEventName(eventName);

			var wrapper = createWrapper(id, eventName, handler);
			if (!wrapper) return element;

			if (element.addEventListener)
			{
				element.addEventListener(name, wrapper, false);
			} else
			{
				element.attachEvent("on" + name, wrapper);
			}

			return element;
		},

		stopObserving: function(element, eventName, handler)
		{
			element = $(element);
			var id = getEventID(element), name = getDOMEventName(eventName);

			if (!handler && eventName)
			{
				getWrappersForEventName(id, eventName).each(function(wrapper)
				{
					element.stopObserving(eventName, wrapper.handler);
				});
				return element;

			} else if (!eventName)
			{
				Object.keys(getCacheForID(id)).each(function(eventName)
				{
					element.stopObserving(eventName);
				});
				return element;
			}

			var wrapper = findWrapper(id, eventName, handler);
			if (!wrapper) return element;

			if (element.removeEventListener)
			{
				element.removeEventListener(name, wrapper, false);
			} else
			{
				element.detachEvent("on" + name, wrapper);
			}

			destroyWrapper(id, eventName, handler);

			return element;
		},

		fire: function(element, eventName, memo)
		{
			element = $(element);
			if (element == document && document.createEvent && !element.dispatchEvent)
				element = document.documentElement;

			if (document.createEvent)
			{
				var event = document.createEvent("HTMLEvents");
				event.initEvent("dataavailable", true, true);
			} else
			{
				var event = document.createEventObject();
				event.eventType = "ondataavailable";
			}

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

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

			return event;
		}
	};
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
	fire: Event.fire,
	observe: Event.observe,
	stopObserving: Event.stopObserving
});

Object.extend(document, {
	fire: Element.Methods.fire.methodize(),
	observe: Element.Methods.observe.methodize(),
	stopObserving: Element.Methods.stopObserving.methodize()
});

(function()
{
	/* Support for the DOMContentLoaded event is based on work by Dan Webb,
	Matthias Miller, Dean Edwards and John Resig. */

	var timer, fired = false;

	function fireContentLoadedEvent()
	{
		if (fired) return;
		if (timer) window.clearInterval(timer);
		document.fire("contentloaded");
		fired = true;
	}

	if (document.addEventListener)
	{
		if (Prototype.Browser.WebKit)
		{
			timer = window.setInterval(function()
			{
				if (/loaded|complete/.test(document.readyState))
					fireContentLoadedEvent();
			}, 0);

			Event.observe(window, "load", fireContentLoadedEvent);
		} 
		else
		{
			document.addEventListener("DOMContentLoaded", fireContentLoadedEvent, false);
		}

	} 
	else
	{
		/* document.write("<script id=__onDOMContentLoaded defer src='://javascript:void(0)'><\/script>"); */
		document.write("<script id='__onDOMContentLoaded' defer src='javascript:void(0);'><\/script>");
		
		$("__onDOMContentLoaded").onreadystatechange = function()
		{
			if (this.readyState == "complete")
			{
				this.onreadystatechange = null;
				fireContentLoadedEvent();
			}
		};
	}
})();
/*------------------------------- DEPRECATED -------------------------------*/

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');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
	// set to true if needed, warning: firefox performance problems
	// NOT neeeded for page scrolling, only if draggable contained in
	// scrollable elements
	includeScrollOffsets: false,

	// must be called before calling withinIncludingScrolloffset, every time the
	// page is scrolled
	prepare: function()
	{
		this.deltaX = window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
		this.deltaY = window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
	},

	// caches x/y coordinate pair to use with overlap
	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);
	},

	// within must be called directly before
	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;
	},

	// Deprecation layer -- use newer Element methods now (1.5.2).

	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);
	}
};

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

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);

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

Element.addMethods();