jsmovead.js

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var brOK=false; 
var mie=false; 
var aver=parseInt(navigator.appVersion.substring(0,1)); 
var aname=navigator.appName; 
function checkbrOK() 
{if(aname.indexOf("Internet Explorer")!=-1) 
{if(aver>=4) brOK=navigator.javaEnabled(); 
mie=true; 
} 
if(aname.indexOf("Netscape")!=-1)  
{if(aver>=4) brOK=navigator.javaEnabled();} 
} 
var vmin=2; 
var vmax=5; 
var vr=2; 
var timer1; 
function Chip(chipname,width,height) 
{this.named=chipname; 
this.vx=vmin+vmax*Math.random(); 
this.vy=vmin+vmax*Math.random(); 
this.w=width; 
this.h=height; 
this.xx=0; 
this.yy=0; 
this.timer1=null; 
} 
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.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+"')",100); 
} 
} 
function stopme(chipname) 
{if(brOK) 
{//alert(chipname) 
eval("chip="+chipname); 
if(chip.timer1!=null) 
{clearTimeout(chip.timer1)} 
} 
} 
var netease; 
var chip; 
function netease() 
{checkbrOK(); 
netease=new Chip("netease",60,80); 
if(brOK) 
{ movechip("netease"); 
} 
}