css背景图根据屏幕大小自动缩放
代码：
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<style>
html,body{margin:0px;padding:0px;}#background { position: fixed;top: 0;left: 0;width: 100%;height: 100%;overflow: hidden;background-color: #211f1f; display:none\8;}#background .bg-photo {position: absolute;top: 0;left: 0;width: 100%;height: 100%;display: none;overflow: hidden;-webkit-background-size: cover !important;-moz-background-size: cover !important;-o-background-size: cover !important;background-size: cover !important;}#background .bg-photo-1 { url(1.jpg ) no-repeat center center;}#background-ie { position: fixed;top: 0;left: 0;width: 100%;height: 100%;overflow: hidden;background-color: #211f1f;}</style>
<div id="background">
<div class="bg-photo bg-photo-1" style="display: block;"></div>
</div>
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本文转自许琴 51CTO博客，原文链接：http://blog.51cto.com/xuqin/1256133，如需转载请自行联系原作者