悬浮图片代码

<script language="javascript">
var brOK=false;
var mie=false;
var vmin=2;
var vmax=5;
var vr=3;
var timer1;
var lovead;

function movechip(chipname){
if(brOK){
eval("chip="+chipname);
if(!mie){pageX=window.pageXOffset;pageW=window.innerWidth;pageY=window.pageYOffset;pageH=window.innerHeight;} else{pageX=window.document.body.scrollLeft;pageW=window.document.body.offsetWidth-8;pageY=window.document.body.scrollTop;pageH=window.document.body.offsetHeight;}
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.xx>=680){chip.xx=chip.xx-20;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();}
if(!mie){eval('document.'+chip.named+'.top ='+chip.yy);eval('document.'+chip.named+'.left='+chip.xx);}else{eval('document.all.'+chip.named+'.style.pixelLeft='+chip.xx);eval('document.all.'+chip.named+'.style.pixelTop ='+chip.yy);}
chip.timer1=setTimeout("movechip('"+chip.named+"')",80);}}

function stopme(chipname){if(brOK){eval("chip="+chipname);if(chip.timer1!=null){clearTimeout(chip.timer1)}}}

function lovead(){
if(navigator.appName.indexOf("Internet Explorer")!=-1){if(parseInt(navigator.appVersion.substring(0,1))>=4) brOK=navigator.javaEnabled();mie=true;}
if(navigator.appName.indexOf("Netscape")!=-1){if(parseInt(navigator.appVersion.substring(0,1))>=4) brOK=navigator.javaEnabled();}
lovead.named="lovead";
lovead.vx=vmin+vmax*Math.random();
lovead.vy=vmin+vmax*Math.random();
lovead.w=1;
lovead.h=1;
lovead.xx=0;
lovead.yy=0;
lovead.timer1=null;
movechip("lovead");}

document.write('<div id="lovead">');
document.write('document.write('<img src="../images/logo.gif" border="0"></div>');
lovead();
</script>