window.onload=netease;  
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");  
}  
}