当鼠标经过缩略图的时候，弹出无边框，显示该图片？？？？？


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<head>
<title>152454</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">
<!--
#msg1{position:absolute;visibility:hidden;background:#F7EFCC;padding:6px;
line-height:22px;font-size:14px;width:240px;top:250px;left:286px;}
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<script type="text/javascript">
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oDiv.style.visibility = "visible";
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function hideMsg(Id){
var oDiv=document.getElementById("msg" + Id);
oDiv.style.visibility="hidden";
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<body>
<a onmouseover="showMsg(1)" onmouseout="hideMsg(1)"><img src="images/gc1.gif" height="136" alt="" border="0"/></a>
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<div id="msg1">
这里弄提示信息
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