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。

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <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(//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(//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> <div id="spritemenu"> <ul> <li class="buttona"><a href="#"><span>home</span></a></li> <li class="buttonb"><a href="#"><span>about</span></a></li> <li class="buttonc"><a href="#"><span>contact</span></a></li> <li class="buttond"><a href="#"><span>forum</span></a></li> <li class="buttone"><a href="#"><span>guestbook</span></a></li> </ul> </div>
[ctrl+a 全选 注:如需引入外部js需刷新才能执行]