经典的对联广告代码，JS代码实现，很简洁，也是通用的代码，随着滚动条的滚动自动适应，对联大小由CSS控制，这使得代码修改起来更加方便快捷，不懂JS也没有关系。不过本代码有一处遗憾就是没有关闭功能，真想用的可以自己加一个。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>标准对联广告Js代码 by www.codefans.net</title>
<style type="text/css">
<!--
#lovexin12,#lovexin14{
width:90px;
height:230px;
background-color:#ededed;
border:1px solid #ddd;
}
html,body{
height:1203px;
}
#mm{
height:1000px;
}
-->
</style>
<script language="JavaScript" type="text/javascript">
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*/}
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;
}
suspendcode12="<DIV id=\"lovexin12\" style='left:2px;POSITION:absolute;TOP:120px;'>ad1</div>"
suspendcode14="<DIV id=\"lovexin14\" style='right:2px;POSITION:absolute;TOP:120px;'>ad2</div>"
document.write(suspendcode12);
document.write(suspendcode14);
window.setInterval("heartBeat()",1);
</script>
</head>
<body>
<div id="mm"></div>
</body>
</html>
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