求一个链接弹出子菜单的js代码

<html>
<head>
<title>链接效果一</title>
<STYLE type="text/css">
<!--
body,div,a{font:menu}
.article { 
BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; FILTER: revealTrans(transition=23,duration=0.5) blendTrans(duration=0.5); POSITION: absolute; VISIBILITY: hidden 
; background-color: #FFCC00; padding-top: 3px; padding-right: 3px; padding-bottom: 3px; padding-left: 3px} 
-->
</STYLE>
<SCRIPT language=JavaScript1.2> 
<!-- 
function Show(divid) { 
divid.filters.revealTrans.apply(); 
divid.style.visibility = "visible"; 
divid.filters.revealTrans.play(); 
} 
function Hide(divid) { 
divid.filters.revealTrans.apply(); 
divid.style.visibility = "hidden"; 
divid.filters.revealTrans.play(); 
} 
//--> 
</script> 
</head>
<body>
<a href="#" onMouseOver=Show(aaa) onMouseOut=Hide(aaa)>
欢迎光临无忧视窗</a></div>
   <div id="aaa" class="article">我们的网址：http://www.51windows.com</div>
</body>
</html>