html部分
<body>
<ul id="list">
<li class="lis">
<h2>我的好友</h2>
<ul>
<li>张三</li>
<li>张三</li>
<li>张三</li>
<li>张三</li>
</ul>
</li>
<li class="lis">
<h2>企业好友</h2>
<ul>
<li>李四</li>
<li>李四</li>
<li>李四</li>
<li>李四</li>
<li>李四</li>
</ul>
</li>
<li class="lis">
<h2>黑名单</h2>
<ul>
<li>张小三</li>
<li>李小四</li>
</ul>
</li>
</ul>
</body>
css部分
<style>
ul , h2 { padding:0; margin:0; }
li { list-style:none; }
#list { width:240px; border:1px solid #333; margin:0 auto; }
#list .lis {}
#list h2 { height:30px; line-height:30px; text-indent:20px; background:url(img/ico1.gif) no-repeat 5px center #6FF; color:#000; }
#list .active { background:url(img/ico2.gif) no-repeat 5px center #FF9; color:#000; }
#list ul { display:none; }
#list ul li { line-height:24px; border-bottom:1px solid #333; text-indent:24px; }
#list ul .hover { background:#6FF; }
</style>
js部分
var list = document.getElementById("list");
var ah2 = list.getElementsByTagName("h2");
var aul = list.getElementsByTagName("ul");
for(var i=0; i<ah2.length; i++){
ah2[i].index = i;
ah2[i].onclick = function(){
if(this.className==""){
aul[this.index].style.display = "block";
this.className = "active";
}else{
aul[this.index].style.display = "none";
this.className = "";
}
}
}
效果图
