网页两侧悬挂广告JS代码

// JavaScript Document
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("lovexin12").style.top=parseInt(document.getElementById("lovexin12").style.top)+percent+"px";
document.getElementById("lovexin14").style.top=parseInt(document.getElementById("lovexin12").style.top)+percent+"px";

lastScrollY=lastScrollY+percent; 
//alert(lastScrollY);
}
suspendcode12="<DIV id="lovexin12" style='left:2px;POSITION:absolute;TOP:69px;'><a href='http://www.ysss.cn/guoqing.asp' target='_blank'><img border=0 src=images/guoqing.gif><br><a href=JavaScript:; onclick="lovexin12.style.visibility='hidden'"><img border=0 src=images/close.gif></a></div>"

suspendcode14="<DIV id="lovexin14" style='right:2px;POSITION:absolute;TOP:69px;'><a href='http://www.ysss.cn/guoqing.asp' target='_blank'><img border=0 src=images/guoqing.gif><br><a href=JavaScript:; onclick="lovexin14.style.display = 'none'"><img border=0 src=images/close.gif></div>"

document.write(suspendcode12); 
document.write(suspendcode14); 
window.setInterval("heartBeat()",1);