图片移动上去加一个遮罩蒙版

 1鼠标移上去在图片上层添加一个蒙版
  下边附上代码和实现效果案例
 <!DOCTYPE html>
 2 <html>
 3     <head>
 4         <meta charset="UTF-8">
 5         <title></title>
 6 <script src="http://code.jquery.com/jquery-latest.js"></script>
 7 
 8         <link rel="stylesheet" type="text/css" href="css/animate.min.css"/>
 9     </head>
10     <style type="text/css">
11         #xx{
12             position: relative; 200px;height: 200px;
13         }
14         .mb{
15             height:200px; 200px;
16             background-color:#9e9e9e;filter:Alpha(Opacity=60);position:absolute;opacity:0.6;top:0;left:0;z-index:10;
17             text-align:center;
18         }
19         #mb_text{
20             line-height: 200px;
21         }
22         .current{
23             display: none;
24         }
25     </style>
26     <script type="text/javascript">
27         $(function(){
28             $("#xx").hover(function(){
29                 $("#mm").toggle();
30             });
31         })
32     </script>
33     <body>
34         <div id="xx" class="img">
35                <img src="http://img30.360buyimg.com/cf/jfs/t2272/225/1335281049/8046/14afb9a/565805c1Nb3eb3c63.jpg" style=" 200px;height: 200px;"/>
36                <div id="mm" class="mb current">
37                <span id="mb_text" class="animated bounceIn">
38                       <a href="#" onclick="alert('123')">----  更多   ----</a>
39                </span>
40             </div>
41             
42         </div>
43     </body>
44 </html>
---- 更多 ----
一切为了梦想！