很实用的 轻量纯css多级下拉菜单
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代码中还没有添加注释，不过不难理解。注释稍后添加。
以下是代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://.w3./TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://.w3./1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
body {
font-family:"宋体";
font-size:12px;
}
.menu {
height:30px;
background:#e6e6e6;
marg-left:10px;
}
.menu a {
text-decoration:none;
}
ul {
marg:0;
paddg:0;
}
.menu li {
list-style:none;
float:left;
width:90px;
overflow:visible;
cursor:poter;
}
ul.level0 {
height:30px;
overflow:visible;
}
ul.level1, ul.level2, ul.level3 {
width:90px;
display:none;
}
ul.level2, ul.level3 {
marg:-28px 0 0 90px;
}
ul.level0 > li {
height:30px;
le-height:30px;
text-align:center;
background:#999;
}
ul.level1 > li, ul.level2 > li, ul.level3 > li {
height:28px;
le-height:28px;
background:#bbb;
}
ul.level0 > li:hover {
background:#c;
}
ul.level1 > li:hover, ul.level2 > li:hover, ul.level3 > li:hover {
background:#ddd;
}
ul.level0 > li.imyeah:hover > ul, ul.level1 > li.imyeah:hover > ul, ul.level2 > li.imyeah:hover > ul, ul.level3 > li.imyeah:hover > ul {
display:block;
}
</style>
</head>
<body>
<div class="menu">
<ul class="level0">
<li class="imyeah"> <a href="#">immenu0</a>
<ul class="level1">
<li> <a href="#">imdropmenu00</a> </li>
<li class="imyeah"> <a href="#">imdropmenu01</a>
<ul class="level2">
<li class="imyeah"> <a href="#">imdropmenu010</a>
<ul class="level3">
<li> <a href="#">imdropmenu0100</a> </li>
<li> <a href="#">imdropmenu0101</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu011</a> </li>
<li> <a href="#">imdropmenu012</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu02</a> </li>
<li> <a href="#">imdropmenu03</a> </li>
<li> <a href="#">imdropmenu04</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu1</a>
<ul class="level1">
<li class="imyeah"> <a href="#">imdropmenu10</a>
<ul class="level2">
<li> <a href="#">imdropmenu100</a> </li>
<li class="imyeah"> <a href="#">imdropmenu101</a>
<ul class="level3">
<li> <a href="#">imdropmenu1010</a> </li>
<li> <a href="#">imdropmenu1011</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu102</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu11</a> </li>
<li> <a href="#">imdropmenu12</a> </li>
<li> <a href="#">imdropmenu13</a> </li>
<li> <a href="#">imdropmenu14</a> </li>
<li> <a href="#">imdropmenu15</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu2</a>
<ul class="level1">
<li> <a href="#">imdropmenu20</a> </li>
<li> <a href="#">imdropmenu21</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu3</a>
<ul class="level1">
<li> <a href="#">imdropmenu30</a> </li>
<li> <a href="#">imdropmenu31</a> </li>
<li> <a href="#">imdropmenu32</a> </li>
</ul>
</li>
<li> <a href="#" class="_lk">immenu4</a> </li>
</ul>
</div>
</body>
</html>
以下是代码
复制代码
代码如下:<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://.w3./TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://.w3./1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
body {
font-family:"宋体";
font-size:12px;
}
.menu {
height:30px;
background:#e6e6e6;
marg-left:10px;
}
.menu a {
text-decoration:none;
}
ul {
marg:0;
paddg:0;
}
.menu li {
list-style:none;
float:left;
width:90px;
overflow:visible;
cursor:poter;
}
ul.level0 {
height:30px;
overflow:visible;
}
ul.level1, ul.level2, ul.level3 {
width:90px;
display:none;
}
ul.level2, ul.level3 {
marg:-28px 0 0 90px;
}
ul.level0 > li {
height:30px;
le-height:30px;
text-align:center;
background:#999;
}
ul.level1 > li, ul.level2 > li, ul.level3 > li {
height:28px;
le-height:28px;
background:#bbb;
}
ul.level0 > li:hover {
background:#c;
}
ul.level1 > li:hover, ul.level2 > li:hover, ul.level3 > li:hover {
background:#ddd;
}
ul.level0 > li.imyeah:hover > ul, ul.level1 > li.imyeah:hover > ul, ul.level2 > li.imyeah:hover > ul, ul.level3 > li.imyeah:hover > ul {
display:block;
}
</style>
</head>
<body>
<div class="menu">
<ul class="level0">
<li class="imyeah"> <a href="#">immenu0</a>
<ul class="level1">
<li> <a href="#">imdropmenu00</a> </li>
<li class="imyeah"> <a href="#">imdropmenu01</a>
<ul class="level2">
<li class="imyeah"> <a href="#">imdropmenu010</a>
<ul class="level3">
<li> <a href="#">imdropmenu0100</a> </li>
<li> <a href="#">imdropmenu0101</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu011</a> </li>
<li> <a href="#">imdropmenu012</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu02</a> </li>
<li> <a href="#">imdropmenu03</a> </li>
<li> <a href="#">imdropmenu04</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu1</a>
<ul class="level1">
<li class="imyeah"> <a href="#">imdropmenu10</a>
<ul class="level2">
<li> <a href="#">imdropmenu100</a> </li>
<li class="imyeah"> <a href="#">imdropmenu101</a>
<ul class="level3">
<li> <a href="#">imdropmenu1010</a> </li>
<li> <a href="#">imdropmenu1011</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu102</a> </li>
</ul>
</li>
<li> <a href="#">imdropmenu11</a> </li>
<li> <a href="#">imdropmenu12</a> </li>
<li> <a href="#">imdropmenu13</a> </li>
<li> <a href="#">imdropmenu14</a> </li>
<li> <a href="#">imdropmenu15</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu2</a>
<ul class="level1">
<li> <a href="#">imdropmenu20</a> </li>
<li> <a href="#">imdropmenu21</a> </li>
</ul>
</li>
<li class="imyeah"> <a href="#" class="_lk">immenu3</a>
<ul class="level1">
<li> <a href="#">imdropmenu30</a> </li>
<li> <a href="#">imdropmenu31</a> </li>
<li> <a href="#">imdropmenu32</a> </li>
</ul>
</li>
<li> <a href="#" class="_lk">immenu4</a> </li>
</ul>
</div>
</body>
</html>
效果图如下
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