动感伸缩、关闭的JS+CSS菜单

答案：<!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=gb2312" />
<title>动感伸缩、关闭的JS+CSS菜单</title>
<script type=text/javascript>
function $(d){
 return document.getElementById(d);
}
function dsp(d,v){
 if(v==undefined){
  return d.style.display;
 }else{
  d.style.display=v;
 }
}
function sh(d,v){
 if(v==undefined){
  if(dsp(d)!='none'&& dsp(d)!=''){
   return d.offsetHeight;
  }
  viz = d.style.visibility;
  d.style.visibility = 'hidden';
  o = dsp(d);
  dsp(d,'block');
  r = parseInt(d.offsetHeight);
  dsp(d,o);
  d.style.visibility = viz;
  return r;
 }else{
  d.style.height=v;
 }
}

s=7;
t=10;
function ct(d){
 d = $(d);
 if(sh(d)>0){
  v = Math.round(sh(d)/d.s);
  v = (v<1) ? 1 :v ;
  v = (sh(d)-v);
  sh(d,v+'px');
  d.style.opacity = (v/d.maxh);
  d.style.filter= 'alpha(opacity='+(v*100/d.maxh)+');';
 }else{
  sh(d,0);
  dsp(d,'none');
  clearInterval(d.t);
 }
}
function et(d){
 d = $(d);
 if(sh(d)<d.maxh){
  v = Math.round((d.maxh-sh(d))/d.s);
  v = (v<1) ? 1 :v ;
  v = (sh(d)+v);
  sh(d,v+'px');
  d.style.opacity = (v/d.maxh);
  d.style.filter= 'alpha(opacity='+(v*100/d.maxh)+');';
 }else{
  sh(d,d.maxh);
  clearInterval(d.t);
 }
}
function cl(d){
 if(dsp(d)=='block'){
  clearInterval(d.t);
  d.t=setInterval('ct("'+d.id+'")',t);
 }
}

function ex(d){
 if(dsp(d)=='none'){
  dsp(d,'block');
  d.style.height='0px';
  clearInterval(d.t);
  d.t=setInterval('et("'+d.id+'")',t);
 }
}
function cc(n,v){
 s=n.className.split(/\s+/);
 for(p=0;p<s.length;p++){
  if(s[p]==v+n.tc){
   s.splice(p,1);
   n.className=s.join(' ');
   break;
  }
 }
}

function Accordian(d,s,tc){
 l=$(d).getElementsByTagName('div');
 c=[];
 for(i=0;i<l.length;i++){
  h=l[i].id;
  if(h.substr(h.indexOf('-')+1,h.length)=='content'){c.push(h);}
 }
 sel=null;
 for(i=0;i<l.length;i++){
  h=l[i].id;
  if(h.substr(h.indexOf('-')+1,h.length)=='header'){
   d=$(h.substr(0,h.indexOf('-'))+'-content');
   d.style.display='none';
   d.style.overflow='hidden';
   d.maxh =sh(d);
   d.s=(s==undefined)? 7 : s;
   h=$(h);
   h.tc=tc;
   h.c=c;
   h.onclick = function(){
    for(i=0;i<this.c.length;i++){
     cn=this.c[i];
     n=cn.substr(0,cn.indexOf('-'));
     if((n+'-header')==this.id){
      ex($(n+'-content'));
      n=$(n+'-header');
      cc(n,'__');
      n.className=n.className+' '+n.tc;
     }else{
      cl($(n+'-content'));
      cc($(n+'-header'),'');
     }
    }
   }
   if(h.className.match(/selected+/)!=undefined){ sel=h;}
  }
 }
 if(sel!=undefined){sel.onClick();}
}
</script>
<style type="text/css">
<!--
body{
 font-size: 12px;
 color: #999999;
 background-color: #000000;
 font-family: Arial, Helvetica, sans-serif;
  text-transform: capitalize;
}
* {
 margin: 0px;
 padding: 0px;
 border: 0px;list-style:none;}
#basic-accordian{
 width:20%;
 z-index:2;
 margin-top: 2%;
 border-top-style: solid;
 border-top-color: #999999;
 border-bottom-style: solid;
 border-bottom-color: #666666;
 padding-top: 15px;
 padding-bottom: 15px;
 margin-bottom: 2%;
}/*菜单背景*/
.accordion_headings{
 padding:2px;
 color:#FFFFFF;
 cursor:pointer;
 font-weight:bold;
 font-size: 14px;
 line-height: 25px;
 letter-spacing: 1px;
}/*菜单分类行*/
.accordion_headings:hover{
}
.accordion_child{
 padding-left: 20px;
 padding-bottom: 8px;
}
.accordion_child ul{}
.accordion_child ul li{
 font-size: 12px;
 display: block;
 line-height: 20px;
 display:block;
}
.accordion_child ul li a{
 text-decoration: none;
 color: #666666;
}
.accordion_child ul li a:hover{
 color: #FFFFFF;
}
.header_highlight{
 background-color: #000000;
 color: #FF0099;
}/*当前显示菜单分类样式*/
 
/*菜单样式结束*/
.main {
 margin-top: 2%;
 width: 96%;
 margin-right: auto;
 margin-left: auto;
}
-->
</style>
</head>
<body onload="new Accordian('basic-accordian',5,'header_highlight');">
<div class="main">
<div id="basic-accordian" ><!--菜单开始-->
<div id="test-header" class="accordion_headings" >开始</div>
<div id="test-content">
    <div class="accordion_child">
 <ul><li><a href="#">网页特效</a></li>
 <li><a href="#">最新源码</a></li>
</ul>   
</div>    
  </div> 
  
  <div id="test1-header" class="accordion_headings" >网页特效</div>
  <div id="test1-content">
    <div class="accordion_child">
<ul><li><a href="#">CSS布局</a></li>
<li><a href="#">菜单导航</a></li>
<li><a href="#">滑动门</a></li>
</ul>
</div></div>
          <div id="test7-header" class="accordion_headings" >ASP源码</div>
<div id="test7-content">
    <div class="accordion_child">
<ul>
  <li><a href="http:">论坛社区</a></li>
  <li><a href="#">新闻文章</a></li>
<li><a href="#">聊天留言</a></li>
</ul>
</div></div>
          <div id="test8-header" class="accordion_headings" >客服中心</div>
<div id="test8-content">
    <div class="accordion_child">
<ul>
  <li><a href="#">常见问题</a></li>
  <li><a href="#">在线留言</a></li>
<li><a href="http://www.baidu.com">联系我们</a></li>
</ul>
</div></div>
</div><!--菜单结束-->
</div><!--main结束-->
</body>
</html>
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