<!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=utf-8" />
<title>无标题文档</title>
<style type="text/css">
/* menu styles */
#jsddm
{ margin: 0;
padding: 0}
#jsddm li
{ float: left;
list-style: none;
font: 12px Tahoma, Arial;}
#jsddm li a
{ display: block;
padding: 5px 12px;
text-decoration: none;
border-right: 1px solid white;
white-space: nowrap}
#jsddm li a:hover
{}
#jsddm li ul
{ margin: 2;
padding: 0;
position: absolute;
visibility: hidden;
border: 1px solid #000000;}
#jsddm li ul li
{ float: none;
display: inline}
#jsddm li ul li a
{ width: auto;
}
#jsddm li ul li a:hover
{ background:#999999}
</style>
<script src="jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
var timeout = 500;
var closetimer = 0;
var ddmenuitem = 0;
function jsddm_open()
{ jsddm_canceltimer();
jsddm_close();
ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');}
function jsddm_close()
{ if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}
function jsddm_timer()
{ closetimer = window.setTimeout(jsddm_close, timeout);}
function jsddm_canceltimer()
{ if(closetimer)
{ window.clearTimeout(closetimer);
closetimer = null;}}
$(document).ready(function()
{ $('#jsddm > li').bind('mouseover', jsddm_open);
});
document.onclick = jsddm_close;
</script>
</head>
<body>
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</body>
</html>
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