var pngbrOK=false; 
var mie=false; 
var aver=parseInt(navigator.appVersion.substring(0,1)); 
var aname=navigator.appName; 
var pngmystop=0; 

function pngcheckbrOK() 
{if(aname.indexOf("Internet Explorer")!=-1) 
{if(aver>=4) pngbrOK=navigator.javaEnabled(); 
mie=true; 
} 
if(aname.indexOf("Netscape")!=-1) 
{if(aver>=4) pngbrOK=navigator.javaEnabled();} 
} 
var vmin=2; 
var vmax=5; 
var vr=2; 
var timer1; 

function pngchip(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 pngmovechip(chipname) 
{ 
if(pngbrOK && pngmystop==0) 
{eval("pngchip="+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; 
} 
pngchip.xx=pngchip.xx+pngchip.vx; 
pngchip.yy=pngchip.yy+pngchip.vy; 
pngchip.vx+=vr*(Math.random()-0.5); 
pngchip.vy+=vr*(Math.random()-0.5); 
if(pngchip.vx>(vmax+vmin)) pngchip.vx=(vmax+vmin)*2-pngchip.vx; 
if(pngchip.vx<(-vmax-vmin)) pngchip.vx=(-vmax-vmin)*2-pngchip.vx; 
if(pngchip.vy>(vmax+vmin)) pngchip.vy=(vmax+vmin)*2-pngchip.vy; 
if(pngchip.vy<(-vmax-vmin)) pngchip.vy=(-vmax-vmin)*2-pngchip.vy; 
if(pngchip.xx<=pageX) 
{pngchip.xx=pageX; 
pngchip.vx=vmin+vmax*Math.random(); 
} 
if(pngchip.xx>=pageX+pageW-pngchip.w) 
{pngchip.xx=pageX+pageW-pngchip.w; 
pngchip.vx=-vmin-vmax*Math.random(); 
} 
if(pngchip.yy<=pageY) 
{pngchip.yy=pageY; 
pngchip.vy=vmin+vmax*Math.random(); 
} 
if(pngchip.yy>=pageY+pageH-pngchip.h) 
{pngchip.yy=pageY+pageH-pngchip.h; 
pngchip.vy=-vmin-vmax*Math.random(); 
} 
if(!mie) 
{eval('document.'+pngchip.named+'.top ='+pngchip.yy); 
eval('document.'+pngchip.named+'.left='+pngchip.xx); 
} 
else 
{eval('document.all.'+pngchip.named+'.style.pixelLeft='+pngchip.xx); 
eval('document.all.'+pngchip.named+'.style.pixelTop ='+pngchip.yy); 
} 
pngchip.timer1=setTimeout("pngmovechip('"+pngchip.named+"')",100); 
} 
} 
function pngstop(x) 
{ 
pngbrOK=true; 
pngmystop=x; 
pngmovechip("pngtome"); 
} 
var pngtome; 
var pngchip; 
function pngtome() 
{pngcheckbrOK(); 
pngtome=new pngchip("pngtome",80,80); 
if(pngbrOK) 
{ pngmovechip("pngtome"); 
} 
} 

ns4=(document.layers)?true:false; 
ie4=(document.all)?true:false; 

function pngover() 
{ 
if(ns4){ 
//document.png.left=window.innerWidth/2-400; 
eval('document.png.left=document.'+pngchip.named+'.left'); 
eval('document.png.top=document.'+pngchip.named+'.top-15'); 
document.png.visibility="show"; 
}else if(ie4) 
{ 
//document.all.png.style.left=window.document.body.offsetWidth/2-400; 
document.all.png.style.left=parseInt(document.all.pngtome.style.left); 
document.all.png.style.top=parseInt(document.all.pngtome.style.top)-20; 
document.all.png.style.visibility="visible"; 
pngstop(1); 
} 
} 

function pngout() 
{ 
if(ns4){ 
document.png.visibility="hide"; 
}else if(ie4) 
{ 
document.all.png.style.visibility="hidden"; 
pngstop(0); 
} 
} 

document.write("<div id='pngtome' style='position:absolute;'><a href='http://www.bjdqfk.com/NewsView.asp?id=77' target=_blank onMouseOver=pngover() onMouseOut=pngout() target='_blank'><img src=http://www.bjdqfk.com/images/tjcx.jpg border=0 ¤北京东汽方科¤></a>" 
+"</div>" 
+" <div id='png' style='position:absolute; left:0;top:0;;visibility:hidden;'>" 
+" <a href='http://www.bjdqfk.com/NewsView.asp?id=77' target=_blank onMouseOver=pngover() onMouseOut=pngout()></a>" 
+" </div>"); 
pngtome()