Util = function(){}
Util.getElementsByClassName = function(_class)
{
	var e = [];
	var a = document.getElementsByTagName("*");
	for(var i=0,len=a.length; i<len; i++ )
	{
		if(a[i].className)
		{
			var c = a[i].className.split(" ");
			for(var j in c)
			{
				if(c[j]==_class) e.push(a[i]);
			}
		}
	}
	return e;
}
Util.getBounds = function(_element)
{
	var width = _element.offsetWidth;
	var height = _element.offsetHeight;
	var left = _element.offsetLeft;
	var top = _element.offsetTop;
	while(_element.offsetParent)
	{
		_element = _element.offsetParent;
		left += _element.offsetLeft;
		top += _element.offsetTop;
	}
	var right = left + width;
	var bottom = top + height;
	return {left:left, top:top, right:right, bottom:bottom, width:width, height:height};
}