<!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>纯css向右展开多级导航菜单代码</title>
<style>
*{margin: 0;padding: 0;}
.qdxw{ margin:100px 100px;}
.qdxw ul a{width: 200px;font-family: '微软雅黑';font-size: 14px;color: #000;text-decoration: none;}
.qdxw ul a:hover{color: #5fb878;text-decoration: none;}
.qdxw ul li{width: 200px;height: 35px;line-height: 35px;text-align: center;position: relative;}
.qdxw ul li:hover{background: aliceblue;}
.qdxw ul{width: 200px;height: auto;position: absolute;background: aliceblue;list-style: none;}
.qdxw ul.nav2{left: 199px;top: 0;display: none;}
.qdxw ul.nav3{left: 199px;top: 0;display: none;}
.qdxw .nav1 .li1:hover ul.nav2{display: block;background: aliceblue;}
.qdxw .nav2 .li2:hover ul.nav3{display: block;background: #c1c1c1;}
</style>
</head>
<body>
<div class="qdxw">
<ul class="nav1">
<li class="li1"> <a href="#">一级导航是我们</a>
<ul class="nav2">
<li class="li2"><a href="#">二级导航</a></li>
<li class="li2"><a href="#">二级导航</a></li>
</ul>
</li>
</ul>
</div>
<br><br><br>
<!--代码部分-->
<div class="qdxw">
<ul class="nav1">
<li class="li1"> <a href="#">一级导航是我们</a>
<ul class="nav2">
<li class="li2"><a href="#">二级导航</a>
<ul class="nav3">
<li class="li3"><a href="#">三级导航</a></li>
<li class="li3"><a href="#">三级导航</a></li>
</ul>
</li>
<li class="li2"><a href="#">二级导航</a></li>
</ul>
</li>
</ul>
</div>
<!--代码部分end-->
</body>