<div style="position:absolute;border:1px solid #000;right:0;width:800px;height:600px;filter:Alpha(Opacity=90);opacity: 0.90;" id="ad"><ul style="background:orange;height:25px;list-style:none;margin:0px;"><li><span style="float:left;padding-left:5px;padding-top:5px;width:600px;font:14px;font-weight:bold;">MMOGH隆重推荐武侠网游--天上碑</span><span style="float:right;text-align:right;width:50px;padding-top:5px;margin-right:5px;"><a href="###" onclick="document.getElementById('ad').style.visibility='hidden';" target="_self" style="font-size:12px;color:#000000;text-decoration:none;">关 闭</a></span></li></ul> <ul style="height:600px;list-style:none;margin:0px"><li><a href="http://www.tianshangbei.com" mce_href="http://www.tianshangbei.com"><img  src="http://www.mmogh.com/tsb.gif" width="800" height="600" border="0"></a></li></ul></div> 
<script language="JavaScript" type="text/javascript"> 
function rightBottomAd(){ 
var abc = document.getElementById("ad"); 
abc.style.top = document.documentElement.scrollTop+document.documentElement.clientHeight-600+"px";
setTimeout(function(){rightBottomAd();},20); 

rightBottomAd(); 
function close_ad(){ 
ad.style.visibility='hidden'; 

</script> 
是这段代码在作怪,如果能去掉最好去掉,去不掉的话加入
window.onload=function()
{
var abc = document.getElementById("ad"); 
abc.style.visibility='hidden';
}