一个简单的处理img加半透明背景技巧
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> 5 <title>mask-layer</title> 6 </head> 7 <style type="text/css"> 8 *{margin:0;padding: 0;} 9 ul{margin:100px auto 0; width:200px;} 10 img{border: 0 none;} 11 li{background-color:#555;list-style: none; width: 146px; height: 220px;} 12 a:hover{opacity: 0.6;} 13 </style> 14 <body> 15 <ul> 16 <li><a href=""><img src="http://h.hiphotos.baidu.com/baike/s%3D220/sign=700b0c26462309f7e36faa10420f0c39/64380cd7912397dd9e0581b65982b2b7d0a28707.jpg" alt="" /></a></li> 17 </ul> 18 </body> 19 </html>
原理:给li加上背景,li的大小就是图片的大小,在a:hover时候改变a的透明度;