代码简介：
jquery配合css来实现的导航，有助您对jquery的学习，很酷的，运行一下，您就知道。
代码内容：
<!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>【荐】采用jquery+css实现极酷的下拉菜单导航_网页代码站(www.webdm.cn)</title>
<script type="text/javascript" src="http://www.webdm.cn/images/20091119/jquery-latest.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("ul.subnav").parent().append("<span></span>"); //Only shows drop down trigger when js is enabled - Adds empty span tag after ul.subnav
$("ul.topnav li span").click(function() { //When trigger is clicked...
//Following events are applied to the subnav itself (moving subnav up and down)
$(this).parent().find("ul.subnav").slideDown('fast').show(); //Drop down the subnav on click
$(this).parent().hover(function() {
}, function(){
$(this).parent().find("ul.subnav").slideUp('slow'); //When the mouse hovers out of the subnav, move it back up
});
//Following events are applied to the trigger (Hover events for the trigger)
}).hover(function() {
$(this).addClass("subhover"); //On hover over, add class "subhover"
}, function(){ //On Hover Out
$(this).removeClass("subhover"); //On hover out, remove class "subhover"
});
});
</script>
<style type="text/css">
body {
margin: 0; padding: 0;
font: 10px normal Arial, Helvetica, sans-serif;
background: #ddd url(http://www.webdm.cn/images/20091119/body_bg.gif) repeat-x;
}
.container {
960px;
margin: 0 auto;
position: relative;
}
#header {
background: url(http://www.webdm.cn/images/20091119/header_bg.gif) no-repeat center top;
padding-top: 120px;
}
#header .disclaimer {
color: #999;
padding: 100px 0 7px 0;
text-align: right;
display: block;
position: absolute;
top: 0; right: 0;
}
#header .disclaimer a { color: #ccc;}
ul.topnav {
list-style: none;
padding: 0 20px;
margin: 0;
float: left;
920px;
background: #222;
font-size: 1.2em;
background: url(http://www.webdm.cn/images/20091119/topnav_bg.gif) repeat-x;
}
ul.topnav li {
float: left;
margin: 0;
padding: 0 15px 0 0;
position: relative; /*--Declare X and Y axis base--*/
}
ul.topnav li a{
padding: 10px 5px;
color: #fff;
display: block;
text-decoration: none;
float: left;
}
ul.topnav li a:hover{
background: url(http://www.webdm.cn/images/20091119/topnav_hover.gif) no-repeat center top;
}
ul.topnav li span { /*--Drop down trigger styles--*/
17px;
height: 35px;
float: left;
background: url(http://www.webdm.cn/images/20091119/subnav_btn.gif) no-repeat center top;
}
ul.topnav li span.subhover {background-position: center bottom; cursor: pointer;} /*--Hover effect for trigger--*/
ul.topnav li ul.subnav {
list-style: none;
position: absolute; /*--Important - Keeps subnav from affecting main navigation flow--*/
left: 0; top: 35px;
background: #333;
margin: 0; padding: 0;
display: none;
float: left;
170px;
-moz-border-radius-bottomleft: 5px;
-moz-border-radius-bottomright: 5px;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
border: 1px solid #111;
}
ul.topnav li ul.subnav li{
margin: 0; padding: 0;
border-top: 1px solid #252525; /*--Create bevel effect--*/
border-bottom: 1px solid #444; /*--Create bevel effect--*/
clear: both;
170px;
}
html ul.topnav li ul.subnav li a {
float: left;
145px;
background: #333 url(http://www.webdm.cn/images/20091119/dropdown_linkbg.gif) no-repeat 10px center;
padding-left: 20px;
}
html ul.topnav li ul.subnav li a:hover { /*--Hover effect for subnav links--*/
background: #222 url(http://www.webdm.cn/images/20091119/dropdown_linkbg.gif) no-repeat 10px center;
}
#header img {
margin: 20px 0 10px;
}
</style>
</head>
<body>
<div class="container">
<div id="header">
<div class="disclaimer">Sexy Drop Down Menu Tutorial by <a href="/">Soh Tanaka</a>.</div>
<ul class="topnav">
<li><a href="http://www.webdm.cn/">网页代码站</a></li>
<li>
<a href="#">原创作品</a>
<ul class="subnav">
<li><a href="#">绘画艺术</a></li>
<li><a href="#">平面设计</a></li>
<li><a href="#">交互设计</a></li>
<li><a href="#">3D艺术</a></li>
<li><a href="#">摄影艺术</a></li>
<li><a href="#">其他艺术</a></li>
</ul>
</li>
<li>
<a href="#">设计素材</a>
<ul class="subnav">
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
</ul>
</li>
<li>
<a href="#">佳作欣赏</a>
<ul class="subnav">
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
<li><a href="#">Sub Nav Link</a></li>
</ul>
</li>
<li><a href="#">论坛</a></li>
<li><a href="#">代码站</a></li>
</ul>
</div>
</div>
</body>
</html>
<br>
<p><a href="http://www.webdm.cn">网页代码站</a> - 最专业的代码下载网站 - 致力为中国站长提供有质量的代码！</p>
代码来自：http://www.webdm.cn/webcode/e36df8f0-e813-48a5-827d-1523cb049321.html