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| 自由浮动图像特效 |
| 整理：Cnwshow.Com 来源：Internet 整理时间：2008-8-22 |
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>自由浮动图像特效</title>
<script type="text/javascript">
var vmin=2;
var vmax=5;
var vr=2;
var timer1;
function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}
function Chip(chipname,width,height){
this.named=chipname;
this.vx=vmin+vmax*Math.random();
this.vy=vmin+vmax*Math.random();
this.w=width+20;
this.h=height;
this.xx=0;
this.yy=0;
this.timer1=null;
}
function movechip(chipname){
if (document.getElementById){
eval("chip="+chipname);
if (window.innerWidth || window.opera){
pageX=window.pageXOffset;
pageW=window.innerWidth-40;
pageY=window.pageYOffset;
pageH=window.innerHeight-20;
}
else if (document.body){
pageX=iecompattest().scrollLeft;
pageW=iecompattest().offsetWidth-40;
pageY=iecompattest().scrollTop;
pageH=iecompattest().offsetHeight-20;
}
chip.xx=chip.xx+chip.vx;
chip.yy=chip.yy+chip.vy;
chip.vx+=vr*(Math.random()-0.5);
chip.vy+=vr*(Math.random()-0.5);
if(chip.vx>(vmax+vmin)) chip.vx=(vmax+vmin)*2-chip.vx;
if(chip.vx<(-vmax-vmin)) chip.vx=(-vmax-vmin)*2-chip.vx;
if(chip.vy>(vmax+vmin)) chip.vy=(vmax+vmin)*2-chip.vy;
if(chip.vy<(-vmax-vmin)) chip.vy=(-vmax-vmin)*2-chip.vy;
if(chip.xx<=pageX){
chip.xx=pageX;
chip.vx=vmin+vmax*Math.random();
}
if(chip.xx>=pageX+pageW-chip.w){
chip.xx=pageX+pageW-chip.w;
chip.vx=-vmin-vmax*Math.random();
}
if(chip.yy<=pageY)
{chip.yy=pageY;
chip.vy=vmin+vmax*Math.random();
}
if(chip.yy>=pageY+pageH-chip.h)
{chip.yy=pageY+pageH-chip.h;
chip.vy=-vmin-vmax*Math.random();
}
document.getElementById(chip.named).style.left=chip.xx+"px";
document.getElementById(chip.named).style.top=chip.yy+"px";
chip.timer1=setTimeout("movechip('"+chip.named+"')",100);
}
}
</script>
<script type="text/javascript">
//Step 1: Define unique variable names depending on number of flying images (ie:3):
var flyimage1, flyimage2, flyimage3
function pagestart(){
//Step 2: Using the same variable names as 1), add or delete more of the below lines (60=width, height=80 of image):
flyimage1=new Chip("flyimage1",47,68);
flyimage2=new Chip("flyimage2",47,68);
flyimage3=new Chip("flyimage3",47,68);
//Step 3: Using the same variable names as 1), add or delete more of the below lines:
movechip("flyimage1");
movechip("flyimage2");
movechip("flyimage3");
}
if (window.addEventListener)
window.addEventListener("load", pagestart, false)
else if (window.attachEvent)
window.attachEvent("onload", pagestart)
else if (document.getElementById)
window.onload=pagestart
</script>
</head>
<body>
<!-- Step 4: Define your flying images. For each image's ID tag, use the same variable names as 1) above -->
<DIV ID="flyimage1" STYLE="position:absolute; left: -500px; width:47; height:68;">
<A HREF="#"><IMG SRC="mini_01.jpg" BORDER=0></a>
</DIV>
<DIV ID="flyimage2" STYLE="position:absolute; left: -500px; width:47; height:68;">
<A HREF="#"><IMG SRC="mini_02.jpg" BORDER=0></a>
</DIV>
<DIV ID="flyimage3" STYLE="position:absolute; left: -500px; width:47; height:68;">
<A HREF="#"><IMG SRC="mini_03.jpg" BORDER=0></a>
</DIV>
</body>
</html>
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