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Use this JavaScript to add a subtle-yet stunning- fireworks effect to your webpage! The effect appears randomly at different locations on the page, always visible, however, even if the user scrolls the page.

Label: Document fire works script

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<style>
#sDiv0 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:Aqua; z-index:9;}
#sDiv1 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:red; z-index:10;}
#sDiv2 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:blue; z-index:11;}
#sDiv3 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:orange; z-index:12;}
#sDiv4 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:yellow; z-index:13;}
#sDiv5 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:lightgreen; z-index:14;}
#sDiv6 {position:absolute; height:1; width:1; font-family:arial black; font-size:15px; color:silver; z-index:15;}
</style>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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<SCRIPT LANGUAGE="JavaScript1.2">
<!--
/*
Document firework script (By Matt Gabbert, mgabbert@usrtoday.com, http://www.nolag.com)
Permission granted to Dynamic Drive to feature script in archive
For full source and 100's more DHTML scripts, visit http://dynamicdrive.com
*/

//set Interval between each firework display, 
var intervals=2000
var sparksOn     = true;
var speed        = 40;
var power        = 3;

//Dont change these values-------
var documentWidth=documentHeight=randomx=randomy=leftcorner=topcorner=0
var ns=(document.layers);
var ie=(document.all);
var ns6=(document.getElementById&&!document.all);
var sparksAflyin = false;
var allDivs      = new Array(10);
var totalSparks  = 0;
//-------------------------------

function initAll(){
	if(!ns && !ie &&!ns6){
	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 if (ns6)
                        allDivs[dNum]=document.getElementById('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||ns6){
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;
	}
	else if(ns6){
		if(tempy+80>(window.innerHeight+pageYOffset))
			tempy=window.innerHeight+pageYOffset-80;
		if(tempx+80>(window.innerWidth+pageXOffset))
			tempx=window.innerWidth+pageXOffset-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>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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<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>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->