固定位置的层
<html><head>
<title>固定位置的层</title></head>
<script language="javascript">
<!--
function test(){
var winHeight=document.body.scrollTop-document.all.iecn.offsetHeight+50;
iecn.style.top = winHeight;
}
//-->
</script>
<body onScroll="test();">
<div id="iecn" style="position:absolute;width:1000px; height:25px;left:10px;top:30px;border:1px #f00 solid; z-index:9;" >welcome to [url]www.iecn.net[/url]</div>
<div style="height:4500px;"> </div>
</body>
</html>
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