EXTRAS = {

	// Event listener by Scott Andrew (www.scottandrew.com):
	addEvent : function(obj, evType, fn, useCapture){
		if (obj.addEventListener){
			obj.addEventListener(evType, fn, useCapture);
			return true;
		} 
		else if (obj.attachEvent){
			var r = obj.attachEvent("on"+evType, fn);
			return r;
		} 
		else {
			return false;
		}
	}, 
	
	// Method adapted from Dan Pupius (pupius.co.uk):
	getElementsByClass : function(className,node) {
		if(!node) node=document;
		var refTags = document.all ? node.all : node.getElementsByTagName("*");
		var retVal = new Array();
		for(var z=0;z<refTags.length;z++) {
			if(refTags[z].className == className) 
			retVal.push(refTags[z]);
		}
		return retVal; 
	}
}


// adds 1 or more elements to an array (IE only)
if(!Array.prototype.push)
{
	Array.prototype.push =  function()
	{
		var i;
		for(i=0; j=arguments[i]; i++) this[this.length] = j;
		return this.length;
	}
}

// ==============================================================
// Crossbrowser Get computed styles 
// (c)2004 Sergi Meseguer http://zigotica.com/ under CC license:
// http://creativecommons.org/licenses/by-sa/2.0/
// ==============================================================
var  CSS = {
	setStyle : function(node,rule,value){
		if(typeof(node)=="string")  node = document.getElementById(node);
		node.style[rule] = value;
	},
	
	getStyle : function(node,rule){
		if(typeof(node)=="string")  node = document.getElementById(node);
		if(rule=="width") return CSS.getW(node);
		else if(rule=="height") return CSS.getH(node);
		else {
			if (window.getComputedStyle) return window.getComputedStyle(node, null)[rule];
			else return node.currentStyle[rule];
		}
	},

	getH : function(node){
		if(typeof(node)=="string")  node = document.getElementById(node);
		return node.offsetHeight;
	},

	getW : function(node){
		if(typeof(node)=="string")  node = document.getElementById(node);
		return node.offsetWidth;
	}
}