function $(name){
	return document.getElementById(name);
}
function getEvent(){
	if(document.all)			//IE
		return window.event;
	var func=getEvent.caller;	//FF
	while(func!=null){   
		var arg0=func.arguments[0];
		if(arg0)
			if((arg0.constructor==Event || arg0.constructor==MouseEvent) || (typeof(arg0)=="object" && arg0.preventDefault && arg0.stopPropagation))
				return arg0;
		func=func.caller;
	}
	return null;
}

function swapImage(obj,atb){
	obj.src=obj.getAttribute(atb);
}

function preLoadImage(){
	var obj=document.getElementsByTagName("IMG");
	for (i=0;i<obj.length;i++){
		if (obj[i].getAttribute("src2")){
			obj[i].setAttribute("src1",obj[i].src);
			var temp=new Image();
			temp.src=obj[i].getAttribute("src2");
		}
	}
}



preLoadImage();

var images=document.getElementsByName("alpha_small");
var alphaS=new Array(images.length);
var alphaB=new Array(images.length);
var URLs=new Array(images.length);
for (i=0;i<images.length;i++){
	alphaS[i]=images[i].src;
	alphaB[i]=images[i].getAttribute("src2");
}
var current=0;
var timeout=window.setTimeout("setAlphaPic("+(current+1)+")",5000);

function setAlphaPic(n){
	if (n==4) n=0;
	if (current==n) return;
	window.clearTimeout(timeout);
	images[current].className="alpha1";
	if (document.all) $("div_concept1").filters[0].Apply();
	$("alpha_big").src=alphaB[n];
	if (document.all) $("div_concept1").filters[0].play(); 		
	images[n].className="alpha2";
	current=n;
	timeout=window.setTimeout("setAlphaPic("+(current+1)+")",5000);
}
function setAlpha2(n){
	images[n].className="alpha2";
}
function setAlpha1(n){
	if (n!=current)
		images[n].className="alpha1";
}