用css3实现当鼠标移进去时当前亮其他变灰效果

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

"http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>用css3实现鼠标移进去当前亮其他变灰</title>

</head>

*{margin: 0;padding: 0;font-size:12px;}

.wrapper{border: 1px #708090 solid;width: 900px;margin: 100px auto;height: 300px;padding: 20px;border-radius: 8px;box-shadow: 2px 2px 6px #666,-2px -2px 6px #666;}

li{list-style: none;}

.box:hover li{opacity:0.2; }

.box li{float: left;width:48px; height:48px;position:relative; margin-right:10px;

-webkit-transition: opacity 1s ease-in-out;

-moz-transition: opacity 1s ease-in-out;

-ms-transition: opacity 1s ease-in-out;

-o-transition: opacity 1s ease-in-out;

transition: opacity 1s ease-in-out;

}

.box li:hover{opacity:1; }

.box li a{position:absolute;left:-10px;width:80px;height:30px;top:-30px;color: #fff;font-weight:bold;background:#000;border-radius:8px;box-shadow:1px 0 2px #fff inset;text-align:center;opacity:0;

-webkit-transition: opacity 1s ease-in-out;

-moz-transition: opacity 1s ease-in-out;

-ms-transition: opacity 1s ease-in-out;

-o-transition: opacity 1s ease-in-out;

transition: opacity 1s ease-in-out;

}

.box li:hover a{opacity:1; top:-30px;}

.delicious { background-image:url("http://images.cnblogs.com/cnblogs_com/hxh-hua/478335/o_delicious.png"); }

.digg { background-image:url("http://images.cnblogs.com/cnblogs_com/hxh-hua/478335/o_digg.png"); }

.facebook { background-image:url("http://images.cnblogs.com/cnblogs_com/hxh-hua/478335/o_facebook.png"); }

.flickr { background-image:url("http://images.cnblogs.com/cnblogs_com/hxh-hua/478335/o_digg.png"); }

.linkedin { background-image:url("http://images.cnblogs.com/cnblogs_com/hxh-hua/478335/o_flickr.png"); }

.box a{display: block;}

</style>

<body>

<div>

<ul>

<li><a href="#" >Delicious</a></li>

<li><a href="#" >Facebook</a></li>

<li><a href="#">Flickr</a></li>

<li><a href="#">LinkedIn</a></li>

</ul>

</div>

</body>

</html>