<html>
<head>
<title>test</title>
<style type="text/css">
#bodybg {
position: absolute;
width: 100%;
height: 100%;
left: 0px;
top: 0px;
z-index: 0;
}
#bodybg .stretch {
width:100%;
height:100%;
}
</style>
</head>
<body>
<!-- 背景图片自适屏幕分辨率 -->
<div id="bodybg">
<img src="http://192.168.0.245/darling/static/images/bg2.jpg" class="stretch" />
</div>
</body>
</html>
<style type="text/css">
div{
width:100%;
height: 500px;
background-image:url('2.png');
background-size:cover;
filter : progid:DXImageTransform.Microsoft.AlphaImageLoader ( sizingMethod='scale' , src='2.png')
}
</style>
<body>
<div></div>
</body>
使用滤镜，其中 sizingMethod="scale" 就是拉伸。