<!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=gb2312" /> <style type="text/css"> #headNav {
width:960px;
height:30px;
line-height:30px;
background-color: lightblue;
margin:0 auto;
} #headNav ul {
list-style:none;
} #headNav ul li {
float:left;
height: 30px;
line-height: 30px;
padding:0 10px;
} #headNav ul li:hover {
background-color: white;
} a {
color:red;
text-decoration:none;
} a:hover { }
</style> </head>
<body>
<div id="headNav">
<ul>
<li><a href="#">首页</a></li>
<li><a href="#">网页版式布局</a></li>
<li><a href="#">div+css教程</a></li>
<li><a href="#">div+css实例</a></li>
<li><a href="#">常用代码</a></li>
</ul>
</div>
</body>
</html>
注意：
①第12行即导航的div要设置其高度