这里采用的是背景定位，代码如下：
<!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" />
<title>MAC风格的水平导航条(DIV+CSS)</title>
<style type="text/css">
body{
background: #FFF;
font-family: Arial, Helvetica, sans-serif;
color: #666666;
padding: 0px;
margin: 5px;
text-align: center;
font-size: 12px;
}#nav{
width: 400px;
text-align: center;
font-size: 11px;
font-family: Arial, Helvetica, sans-serif;
margin:15px auto;
}
#nav ul{
margin: 0px;
padding: 0px;
list-style-type: none;
}
#nav li{
float: left;
}
#nav li a{
text-decoration: none;
color: #666;
background: url(http://www.makewing.com/lanren/menu/11/images/menubg.gif) no-repeat 0px 0px;
width: 100px;
line-height: 20px;
display: block;
}
#nav li a:hover{
color: #CC0000;
background: url(http://www.makewing.com/lanren/menu/11/images/menubg.gif) no-repeat 0px -20px;
}
</style>
</head><body>
<div id="nav"><ul><li><a href="#">Home</a></li><li><a href="#">About us</a></li><li><a href="#">Products</a></li><li><a href="#">Services</a></li></ul></div>
</body>
</html>
