lastScrollY = 0;
function heartBeat(){ 
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
 diffY = document.documentElement.scrollTop;
else if (document.body)
 diffY = document.body.scrollTop
else
    {/*Netscape stuff*/}
 
//alert(diffY);
percent=.1*(diffY-lastScrollY); 
if(percent>0)percent=Math.ceil(percent); 
else percent=Math.floor(percent); 
document.getElementById("leftDiv").style.top = parseInt(document.getElementById("leftDiv").style.top)+percent+"px";
document.getElementById("rightDiv").style.top = parseInt(document.getElementById("leftDiv").style.top)+percent+"px";
lastScrollY=lastScrollY+percent; 
//alert(lastScrollY);
}
//下面这段删除后，对联将不跟随屏幕而移动。
window.setInterval("heartBeat()",1);

if (screen.availWidth>800) {
document.write("<div id=leftDiv style='top:8px; left:2px; '><a href='http://sz.haocf.net/cfad/gxdc/'  target=_blank ></a><br><br><a href='http://sz.haocf.net/cfad/tongfukang/'  target=_blank ></a>"
			   +"</div>"
 +"<div id=rightDiv style='top:8px; right:0px; '><a href='http://sz.haocf.net/shop/4210' target=_blank ><img src=http://sz.haocf.net/cfad/ycdc/show.gif  border=0></a><br><br><a href='http://sz.haocf.net/cfad/lzecf2/'  target=_blank ><img src=http://sz.haocf.net/cfad/lzecf2/show.gif  border=0></a>"
 +"</div>");
}