大量的CSS网页布局实例中，包括了很多CSS菜单方面的知识与案例，但是大家对这些知识的学习依然非常热衷。今天向大家介绍一款，非常经典的，纯CSS实现的下拉导航菜单，此案例中的浏览器条件注释信息也值得大家学习。
<!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>css下拉菜单 - 52css.com<itle>
<!--[if IE 7]><!-->
<link rel="stylesheet" type="text/css" href="menu1.css" />
<!--<![endif]-->
<!--[if lte IE 6]><link rel="stylesheet" type="text/css" href="menu2.css" /><![endif]-->
<style>
@charset "utf-8";
/* CSS Document */
body {
font-family:verdana, sans-serif;
font-size:small;
}
#navigation , #navigation li ul{
padding:0;
margin:0;
list-style-type: none;
}
#navigation li {
float:left;
text-align:center;
position:relative;
}
#navigation li h3 {
margin:0;
}
#navigation li a:link, #navigation li a:visited {
display:block;
text-decoration:none;
color:#000;
width:120px;
height:30px;
line-height:30px;
border:1px solid #fff;
border-width:1px 1px 0 0;
background:#c5dbf2;
padding-left:10px;
}
#navigation li ul {
display: none;
}
table {
margin:-1px;
border-collapse:collapse;
}
/* 以下只支持非IE6浏览器 */
#navigation li:hover a {
color:#fff;
background:#ff0000;
}
#navigation li:hover ul {
display:block;
position:absolute;
top:30px;
margin-top:1px;
left:0;
width:120px;
}
#navigation li:hover ul li a {
display:block;
background:#c5dbf2;
color:#000;
height:15px;
line-height:15px;
padding:5px 10px;
width:110px;
}
#navigation li:hover ul li a:hover {
color:#fff;
background:#647413;
}
body
{ font-family:verdana, sans-serif; font-size:small;}
#navigation ,
#navigation li ul{ padding:0; margin:0; list-style-type: none;}
#navigation li { float:left; text-align:center; position:relative;
}#navigation li h3 { margin:0; }
#navigation li a:link, #navigation li a:visited { display:block; text-decoration:none; color:#000; width:120px; height:40px; line-height:40px; border:1px solid #fff; border-width:1px 1px 0 0; background:#c5dbf2; padding-left:10px; }
#navigation li ul{ display: none;}table { margin:-1px; border-collapse:collapse;}/* IE6浏览器专用 */
#navigation li a:hover { color:#fff; background:#2687eb;}
#navigation li a:hover ul { display:block; position:absolute; top:40px; margin-top:1px; left:0; width:120px;}
#navigation li a:hover ul li a { display:block; background:#c5dbf2; color:#000; height:20px; line-height:20px; padding:5px 10px; width:110px;}
#navigation li a:hover ul li a:hover { color:#fff; background:#6b839c; }
</style>
</head>
<body>
<ul >
<li> <a href="#">栏目1
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->
<table>
<tr>
<td><ul>
<li><a href="#">栏目1-->菜单1</a></li>
<li><a href="52css.comhttp://www.52css.com">52css.com</a></li>
<li><a href="#">栏目1-->菜单3</a></li>
<li><a href="#">栏目1-->菜单4</a></li>
</ul><d>
<r>
<able>
<!--[if lte IE 6]>
</a>
<![endif]-->
</li>
<li> <a href="#">栏目2
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->
<table>
<tr>
<td><ul>
<li><a href="#">栏目2-->菜单1</a></li>
<li><a href="#">栏目2-->菜单2</a></li>
<li><a href="#">栏目2-->菜单3</a></li>
<li><a href="#">栏目2-->菜单4</a></li>
<li><a href="#">栏目2-->菜单5</a></li>
</ul><d>
<r>
<able>
<!--[if lte IE 6]>
</a>
<![endif]-->
</li>
<li> <a href="#">栏目3
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->
<table>
<tr>
<td><ul>
<li><a href="#">栏目3-->菜单1</a></li>
<li><a href="#">栏目3-->菜单2</a></li>
<li><a href="#">栏目3-->菜单3</a></li>
</ul><d>
<r>
<able>
<!--[if lte IE 6]>
</a>
<![endif]-->
</li>
</ul>
</body>
</html>
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