background-image: url(‘file:///F:/images/bg.jpg‘); background-size:cover; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=‘file:///F:/images/bg.jpg‘,sizingMethod=‘scale‘);
注意点：
background-size兼容IE8
原文：https://www.cnblogs.com/rroocc/p/10660927.html
