Javascript Code: Exploding stars fancy website

This is a fancy code which moves some colorful stars around your webpage whether it's html or php, it doesn't matter. It works with everything. Try it.

<!-- this script got from www.javascriptfreecode.com coded by: Kerixa Inc. -->

<script LANGUAGE="JavaScript1.2">



//set Interval between each firework display, 
var intervals=2000
var sparksOn     = true;
var speed        = 25;
var power        = 1;

//Dont change these values-------
var documentWidth=documentHeight=randomx=randomy=leftcorner=topcorner=0
var ns=(document.layers);
var ie=(document.all);
var sparksAflyin = false;
var allDivs      = new Array(10);
var totalSparks  = 0;
//-------------------------------

function initAll(){
	if(!ns && !ie){
	sparksOn = false;
	return;
	}
setInterval("firework()",intervals)

if (ns)
	document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE);
	for(dNum=0; dNum<7; ++dNum){
		if(ie)
			allDivs[dNum]=eval('document.all.sDiv'+dNum+'.style');
		else
			allDivs[dNum]=eval('document.layers["sDiv'+dNum+'"]');
	}
}

function firework(){
//below code detects the browser dimenions
if (ie){
documentWidth=document.body.clientWidth
documentHeight=document.body.clientHeight
leftcorner=document.body.scrollLeft
topcorner=document.body.scrollTop
}
else if (ns){
documentWidth=window.innerWidth
documentHeight=window.innerHeight
leftcorner=pageXOffset
topcorner=pageYOffset

}
//below code randomly generates a set of coordinates that fall within the dimension
randomx=leftcorner+Math.floor(Math.random()*documentWidth)
randomy=topcorner+Math.floor(Math.random()*documentHeight)


	if(sparksOn){
		if(!sparksAflyin){
			sparksAflyin=true;
			totalSparks=0;
			for(var spark=0;spark<=6;spark++){
				dx=Math.round(Math.random()*50);
				dy=Math.round(Math.random()*50);
				moveTo(spark,randomx,randomy,dx,dy);
			}
		}
	}
}

function moveTo(i,tempx,tempy,dx,dy){
	if(ie){
		if(tempy+80>(document.body.offsetHeight+document.body.scrollTop))
			tempy=document.body.offsetHeight+document.body.scrollTop-80;
		if(tempx+80>(document.body.offsetWidth+document.body.scrollLeft))
			tempx=document.body.offsetWidth+document.body.scrollLeft-80;
	}
	if(tempx>-50&&tempy>-50){
		tempx+=dx;tempy+=dy;	
		allDivs[i].left=tempx;
		allDivs[i].top=tempy;
		dx-=power;dy-=power;
		setTimeout("moveTo("+i+","+tempx+","+tempy+","+dx+","+dy+")",speed)
	}
	else
		++totalSparks
	if(totalSparks==7){
		sparksAflyin=false;
		totalSparks=0;
	}
}
window.onload=initAll
//End-->
</script>
<style>
#sDiv0 {position:absolute; height:1; width:1; font-family:arial black; font-size:25px; color:Aqua;}
#sDiv1 {position:absolute; height:1; width:1; font-family:arial black; font-size:22px; color:red;}
#sDiv2 {position:absolute; height:1; width:1; font-family:arial black; font-size:20px; color:blue;}
#sDiv3 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:orange;}
#sDiv4 {position:absolute; height:1; width:1; font-family:arial black; font-size:25px; color:yellow;}
#sDiv5 {position:absolute; height:1; width:1; font-family:arial black; font-size:25px; color:lightgreen;}
#sDiv6 {position:absolute; height:1; width:1; font-family:arial black; font-size:20px; color:silver;}
</style>
<p></p>
<div id="sDiv0">
  *</div>
<div id="sDiv1">
  *</div>
<div id="sDiv2">
  *</div>
<div id="sDiv3">
  *</div>
<div id="sDiv4">
  *</div>
<div id="sDiv5">
  *</div>
<div id="sDiv6">
  *</div>
</body>

</html>


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