css3 background-size:兼容IE8
.imgbgsize{
background:url([网站首页]/images/QrCode.jpg;
width: 150px;
height: 150px;
background-size: contain;
background-position: center;
background-repeat: no-repeat;
margin: 0px auto;
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='[网站首页]/images/QrCode.jpg', sizingMethod='scale');
}