背景图片按比例拉伸自适应大小

1.css

.bg{

background:url(http://wyz.67ge.com/wp-content/uploads/qzlogo.jpg);
filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')";
-moz-background-size:100% 100%;
    background-size:100% 100%;

}

2.js

$("#top_data").css("background","url("+waf.getContextPath()+"/webviews/vk/images/11.png)");
$("#top_data").css("filter","progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')");
$("#top_data").css("-moz-background-size","100% 100%");
$("#top_data").css("background-size","100% 100%");