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<html>
<head>
<meta charset="utf-8"/>
<title>4_竖向折叠导航菜单_1</title>
<style type="text/css">
/*全局设定*/
.nav{position: absolute;top:100px;left: 100px;}
*{margin: 0;padding: 0;font-size: 14px;font-size: "微软雅黑";}
ul{list-style: none;}
.nav a{text-decoration: none;display: block; 135px;height: 30px;line-height: 30px;color: #fff;text-align: center;}
/*一级列表设定*/
.a1{font-size: 16px;height: 35px;line-height: 35px;}
.nav{background-color: #888;}
.li0{border-top: 2px solid #bbb;}
.li0:first-child{border: 0;}
/*二级列表设定*/
.nav1{display: none;background-color: #bbb;}
/*伪类*/
.li0:hover .a1{background-color: #444;font-weight: bold;font-size: 17px;}
.nav1 a:hover{background-color: #f60;font-weight: bold;font-size: 15px;}
</style>
</head>
<body>
<ul class="nav">
<li class="li0"><a class="a1">草帽海贼团</a>
<ul class="nav1" id="nav101">
<li class="li1"><a href="">路飞</a></li>
<li class="li1"><a href="">索隆</a></li>
<li class="li1"><a href="">山治</a></li>
</ul>
</li>
<li class="li0"><a class="a1">海军</a>
<ul class="nav1" id="nav102">
<li class="li1"><a href="">黄猿</a></li>
<li class="li1"><a href="">青雉</a></li>
<li class="li1"><a href="">赤犬</a></li>
</ul>
</li>
<li class="li0"><a class="a1">现任王下七武海</a>
<ul class="nav1" id="nav103">
<li class="li1"><a href="">汉库克</a></li>
<li class="li1"><a href="">米霍克</a></li>
<li class="li1"><a href="">熊</a></li>
<li class="li1"><a href="">巴基</a></li>
<li class="li1"><a href="">白胡子二世</a></li>
</ul>
</li>
<li class="li0"><a class="a1">革命军</a>
<ul class="nav1" id="nav104">
<li class="li1"><a href="">龙</a></li>
<li class="li1"><a href="">萨博</a></li>
<li class="li1"><a href="">人妖王</a></li>
</ul>
</li>
<li class="li0"><a class="a1">现任四皇</a>
<ul class="nav1" id="nav105">
<li class="li1"><a href="">香克斯</a></li>
<li class="li1"><a href="">凯多</a></li>
<li class="li1"><a href="">玲玲</a></li>
<li class="li1"><a href="">蒂奇</a></li>
</ul>
</li>
</ul>
</body>
<script src = "js/jquery-1.4.2.min.js"> </script>
<script>
$(function(){
$('.li0 .a1').each(function(){
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</html>