1 body{ 2 height:100%; 3 overflow:hidden; 4 } 5 .bg { 6 background-image: url(../../img/beijing.jpg); 7 width:100%; 8 height:100%; 9 background-size:100% 100%; 10 position:absolute; 11 filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='bg-login.png',sizingMethod='scale'); 12 } 13 14 <body class="bg"> 15 16 </body>