This javascript code allows a series of cool bursting fireworks effect that will show upon viewer entering the web page with this code inserted.

Insert this code into your BODY of HTML

<Script language="JavaScript1.2"> /* Document firework script (By Kurt Gregg, kurt.grigg@virgin.net) This Code Free To Use - Providing This Notice Remains JavaScript Code Effect Found At: Development Resource & JavaScript Code & Generator Public Archive Center Located: http://www.DesignerWiz.com Though This Material May Have Been In A Public Depository, Certain Author Copyright Restrictions May Apply* */ var ns=document.layers?1:0 var ie4=document.all?1:0 var ns6=document.getElementById&&!document.all?1:0 amount=14; if (ns){ for (i=0; i < amount; i++) document.write("<LAYER NAME='nsstars"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,1,1'></LAYER>"); } else if (ie4||ns6){ document.write("<div id='ieCov' style='position:absolute;top:0px;left:0px'>"); document.write("<div style='position:relative'>"); for (i=0; i < amount; i++) document.write("<div id='iestars"+i+"' style='position:absolute;top:0px;left:0px;width:1;height:1;background:#ffffff;font-size:1;z-index:10'></div>"); document.write("</div></div>"); } Clrs=new Array('ff0000','00ff00','ffffff','ff00ff','ffa500','ffff00','00ff00','ffffff','ff00ff') sClrs=new Array('ffa500','00ff00','FFAAFF','fff000','fffffF') Xpos=300; Ypos=150; initialStarColor='00ff00'; step=5; currStep=0; explosionSize=120; function Fireworks(){ var WinHeight=(ns||ns6)?window.innerHeight-100:window.document.body.clientHeight-100; var WinWidth=(ns||ns6)?window.innerWidth-100:window.document.body.clientWidth-100; var Yscroll=(ns||ns6)?window.pageYOffset:document.body.scrollTop; for (i=0; i < amount; i++){ if (ie4||ns6) var layer=ns6?document.getElementById("iestars"+i).style : eval("iestars"+i).style; else if (ns) var layer=document.layers["nsstars"+i] var randCol=Math.round(Math.random()*8); var randSz=Math.round(Math.random()*2); layer.top = Ypos + explosionSize*Math.sin((currStep+i*5)/3)*Math.sin(currStep/100) layer.left= Xpos + explosionSize*Math.cos((currStep+i*5)/3)*Math.sin(currStep/100) if (currStep < 110){ if (ns){layer.bgColor=initialStarColor;layer.clip.width=1;layer.clip.height=1} else{layer.background=initialStarColor;layer.width=1;layer.height=1;layer.fontSize=1} } else{ if (ns){layer.bgColor=Clrs[randCol];layer.clip.width=randSz;layer.clip.height=randSz} else{layer.background=Clrs[randCol];layer.width=randSz;layer.height=randSz;layer.fontSize=randSz} } } if (currStep > 220) { currStep=0; Ypos = 50+Math.round(Math.random()*WinHeight)+Yscroll; Xpos = 50+Math.round(Math.random()*WinWidth); for (i=0; i < sClrs.length; i++) { var newIcol=Math.round(Math.random()*i); } initialStarColor=sClrs[newIcol]; explosionSize=Math.round(80*Math.random()+100); } currStep+=step; setTimeout("Fireworks()",20); } Fireworks(); // --> </script>

Simply Cut and Paste Script code
Be sure to properly place script position in Body section of html
Best effect if used on dark background. If you look closely in the center of this page you will see the effect

Credit: Roberto de Jesus Asyn Diaz Homepage

This script has been in the DesignerWiz.com Public Library.