花炮效果

提示：好漂亮的烟花啊！如果背景色是黑色就更好了。

1.将下面的代码复制到 <body> 内

<SCRIPT LANGUAGE="JavaScript1.2">
<!--

/*
Document firework script (By Matt Gabbert, mgabbert@usrtoday.com, http://www.nolag.com)
Modified and 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 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);
			}
		}
	}
}

2.在<body>中加上
<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>