那位懂js的能否帮帮忙，谢谢
<style><!--
#foldheader{cursor:hand ; font-weight:normal;
list-style-image:url(images/folder.gif)}
#foldinglist{list-style-image:url(images/char02.gif)}
//body {
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}
-->
</style>
<script language="JavaScript1.2">
var head="display:''"
img1=new Image()
img1.src="images/folder.gif"
img2=new Image()
img2.src="images/folder.gif"
function change(){
if(!document.all)
return
if (event.srcElement.id=="foldheader") {
var srcIndex = event.srcElement.sourceIndex
var nested = document.all[srcIndex+1]
if (nested.style.display=="none") {
nested.style.display=''
event.srcElement.style.listStyleImage="url(images/folder_open.gif)"
}
else {
nested.style.display="none"
event.srcElement.style.listStyleImage="url(images/folder.gif)"
}
}
}
document.onclick=change
//-->
</script>
<meta http-equiv="Content-Type" content="text/html; charset=??????">
<link href="css/font.css" rel="stylesheet" type="text/css">
<title>系统导航</title>
<style type="text/css">
<!--
body {
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}
-->
</style></head>
<body>
<table width="160" height="100%" border="0" align="left" cellpadding="0" cellspacing="0">
<tr>
<td width="159" height="20" bgcolor="#F2F2F2"> </td>
<td width="1" rowspan="3" bgcolor="#CCCCCC"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">
<ul>
<li id="foldheader" class="sub_title"> 我的通讯录</li>
<ul id="foldinglist" style="display:none">
<li><a href="#" target="madin" class="sub">xxxx</a></li>
<li><a href="#" target="madin" class="sub">xxxx</a></li>
</ul>
<li id="foldheader" class="sub_title"> xxxx</li>
<ul id="foldinglist" style="display:none" >
<li><a href="#" target="madin" class="sub">xxxx</a></li>
</ul>
<script language="JavaScript1.2">
function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) {
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}
if (get_cookie(window.location.pathname) != ''){
var openresults=get_cookie(window.location.pathname).split(" ")
for (i=0 ; i < openresults.length ; i++){
foldinglist[openresults[i]].style.display=''
document.all[foldinglist[openresults[i]].sourceIndex -
1].style.listStyleImage="url(images/folder.gif)"
}
}
if (document.all){
var nodelength=foldinglist.length-1
var nodes=new Array(nodelength)
var openones=''
}
function check(){
for (i=0 ; i <= nodelength ; i++){
if (foldinglist[i].style.display=='')
openones=openones + " " + i
}
document.cookie=window.location.pathname+"="+openones
}
if (document.all)
document.body.onunload=check
//-->
</script>
......
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