<!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>Jqyery+CSS折叠、合拢的多级菜单</title>
<style type="text/css">
*,body,ul,li,h1,h2{
margin:0;
padding:0;
list-style:none;
}
body{
font:12px "宋体";
}
.tree_box{
margin: 5px 0;
width: 100px;
overflow: hidden;
}
.tree_box h3,.tree_one h4,.tree_two li{
cursor: pointer;
}
.tree_one,.tree_two{
display: none;
margin: 0 0 0 10px;
overflow: hidden;
}
.tree_one li{
margin: 5px 0;
}
</style>
<script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="scripts/jquery-1.8.3.js"></script>
</head>
<body>
<div class="tree">
<div class="tree_box">
<h3>我是一级菜单</h3>
<ul class="tree_one">
<li><h4>我是二级菜单</h4>
</li>
<li><h4>我是二级菜单</h4>
</li>
<li><h4>我是二级菜单</h4>
<ul class="tree_two">
<li>我是三级菜单</li>
<li>我是三级菜单</li>
<li>我是三级菜单</li>
</ul>
</li>
</ul>
</div>
<div class="tree_box">
<h3>我是一级菜单</h3>
<ul class="tree_one">
<li><h4>我是二级菜单</h4>
<ul class="tree_two">
<li>我是三级菜单</li>
<li>我是三级菜单</li>
<li>我是三级菜单</li>
</ul>
</li>
<li><h4>我是二级菜单</h4>
<ul class="tree_two">
<li>我是三级菜单</li>
<li>我是三级菜单</li>
<li>我是三级菜单</li>
</ul>
</li>
</ul>
</div>
<div class="tree_box"><h3>我是一级菜单</h3>
<ul class="tree_one">
<li><h4>我是二级菜单</h4>
<ul class="tree_two">
<li>我是三级菜单</li>
<li>我是三级菜单</li>
<li>我是三级菜单</li>
</ul>
</li>
</ul>
</div>
</div>
<script type="text/javascript">
$(function three_level_menu(){
var h3 = $(".tree_box").find("h3");
var tree_one = $(".tree_box").find(".tree_one");
var h4 = $(".tree_one").find("h4");
var tree_two = $(".tree_one").find(".tree_two");
h3.each(function(){
$(this).click(function(){
$(this).next().slideToggle();
})
})
h4.each(function(i){
$(this).click(function(){
$(this).next().slideToggle();
})
})
})
</script>
</body>
</html>
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