CSS鼠标悬停菜单图片交换技术实现

实际上，这里的图片在正常使用时完全可以用CSS代码来定义。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 
<head> 
<title>使用图片交换技术制作CSS鼠标悬停菜单</title> 
<style type="text/css"> 
div#spritemenu { 
    height: 50px; 
width: 400px; 
font-size: 9px; 
background-image: url(http://files.jb51.net/demoimg/200911/spritemenu.gif); 
overflow: hidden; 
} 
div#spritemenu ul li { 
display: inline; 
margin: 0px; 
padding: 0px; 
} 
div#spritemenu ul li a { 
display: block; 
position:relative; 
height: 50px; 
} 
div#spritemenu ul li a:hover { 
background-image: url(http://files.jb51.net/demoimg/200911/spritemenu.gif); 
} 
div#spritemenu ul { 
margin: 0px; 
padding: 0px; 
list-style-type:none; 
height: 50px; 
} 
div#spritemenu span { 
display: none; 
}

div#spritemenu li.buttonA a {top: 0px; left: 0px; width: 80px; background-position: 0px 0px;} 
div#spritemenu li.buttonB a {top: -50px; left: 82px; width: 64px; background-position: -82px 0px;} 
div#spritemenu li.buttonC a {top: -100px; left: 148px; width: 76px; background-position: -148px 0px;} 
div#spritemenu li.buttonD a {top: -150px; left: 226px; width: 70px; background-position: -226px 0px;} 
div#spritemenu li.buttonE a {top: -200px; left: 298px; width: 102px; background-position: -298px 0px;} 
div#spritemenu li.buttonA a:hover {background-position: 0px -50px;} 
div#spritemenu li.buttonB a:hover {background-position: -82px -50px;} 
div#spritemenu li.buttonC a:hover {background-position: -148px -50px;} 
div#spritemenu li.buttonD a:hover {background-position: -226px -50px;} 
div#spritemenu li.buttonE a:hover {background-position: -298px -50px;} 
</style> 
</head> 
<body> 
<div id="spritemenu"> 
<ul> 
    <li class="buttonA"><span>Home</span></li> 
    <li class="buttonB"><span>About</span></li> 
    <li class="buttonC"><span>Contact</span></li> 
    <li class="buttonD"><span>Forum</span></li> 
    <li class="buttonE"><span>Guestbook</span></li> 
</ul> 
</div> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

CSS鼠标悬停菜单图片交换技术实现_导航菜单