var Class = 
{
	create: function()
	{
		return function()
		{
			this.initialize.apply(this, arguments);
		}
	}
}

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

Function.prototype.bindAsEventListener = function(object)
{
	var __method = this;
	return function(event)
	{
		return __method.call(object, event || window.event);
	}
}

function $()
{
	var results = [], element;
	for (var i = 0; i < arguments.length; i++)
	{
		element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		results.push(Element.extend(element));
	}
	return results.length < 2 ? results[0]: results;
}

if (!window.Element)
	var Element = new Object();

Element.extend = function(element)
{
	if (!element)
	{
		return;
	}
	if (_nativeExtensions)
	{
		return element;
	}

	if (!element._extended && element.tagName && element != window)
	{
		var methods = Element.Methods;
		for (property in methods)
		{
			var value = methods[property];
		}
	}
	element._extended = true;
	return element;
}

Element.Methods = 
{
	getStyle: function(element, style)
	{
		element = $(element);
		var value = element.style[style.camelize()];
		if (!value)
		{
			if (document.defaultView && document.defaultView.getComputedStyle)
			{
				var css = document.defaultView.getComputedStyle(element, null);
				value = css ? css.getPropertyValue(style): null;
			}
			else if (element.currentStyle)
			{
				value = element.currentStyle[style.camelize()];
			}
		}

		if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
		{
			if (Element.getStyle(element, 'position') == 'static')
			{
				value = 'auto';
			}
		}

		return value == 'auto' ? null : value;
	}

}

var _nativeExtensions = false;

if (!window.Event)
{
	var Event = new Object();
}

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, 

	element: function(event)
	{
		return event.target || event.srcElement; 
	}
	, 

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

	pointerX: function(event)
	{
		return event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft)); 
	}
	, 

	pointerY: function(event)
	{
		return event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop)); 
	}
	, 

	stop: function(event)
	{
		if (event.preventDefault)
		{
			event.preventDefault();
			event.stopPropagation(); 
		}
		else
		{
			event.returnValue = false;
			event.cancelBubble = true; 
		}
	}
	, 

	observers: false, 

	_observeAndCache: function(element, name, observer, useCapture)
	{
		if (!this.observers)this.observers = []; if (element.addEventListener)
		{
			this.observers.push([element, name, observer, useCapture]);
			element.addEventListener(name, observer, useCapture); 
		}
		else if (element.attachEvent)
		{
			this.observers.push([element, name, observer, useCapture]);
			element.attachEvent('on' + name, observer); 
		}
	}
	, 

	unloadCache: function()
	{
		if (!Event.observers)return ; for (var i = 0; i < Event.observers.length; i++)
		{
			Event.stopObserving.apply(this, Event.observers[i]);
			Event.observers[i][0] = null; 
		}
		Event.observers = false; 
	}
	, 

	observe: function(element, name, observer, useCapture)
	{
		var element = $(element); useCapture = useCapture || false; 

		if (name == 'keypress' && (navigator.appVersion.match( / Konqueror | Safari | KHTML / ) || element.attachEvent))
		{
			name = 'keydown';
		}

		this._observeAndCache(element, name, observer, useCapture); 
	}
	, 

	stopObserving: function(element, name, observer, useCapture)
	{
		var element = $(element); useCapture = useCapture || false; 

		if (name == 'keypress' && (navigator.appVersion.match( / Konqueror | Safari | KHTML / ) || element.detachEvent))
		{
			name = 'keydown';
		}

		if (element.removeEventListener)
		{
			element.removeEventListener(name, observer, useCapture); 
		}
		else if (element.detachEvent)
		{
			element.detachEvent('on' + name, observer); 
		}
	}
});

if (navigator.appVersion.match(/\bMSIE\b/))
{
	Event.observe(window, 'unload', Event.unloadCache, false);
}
var Position = 
{
	includeScrollOffsets: false, prepare: function()
	{
		this.deltaX = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0;
		this.deltaY = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0;
	}
	, 

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

	offsetParent: 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;
	}
}

if ( / Konqueror | Safari | KHTML / .test(navigator.userAgent))
{
	Position.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 [valueL, valueT];
	}
}