手机背景图片自适应浏览器屏幕大小，完全填满
通用：
<div >
<img src="pictures/background.jpg" height="100%" width="100%"/>
</div>
引用jquery:
<div >
<script type="text/javascript">
$(function(){
$('#formbackground').height($(window).height());
$('#formbackground').width($(window).width());
});
</script>
兼容火狐、谷歌和IE浏览器:
.bg{
background:url(http://wyz.67ge.com/wp-content/uploads/qzlogo.jpg);
filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')";
-moz-background-size:100% 100%;
-webkit-background-size:100% 100%;
background-size:100% 100%;
}
背景图铺满整个页面：background-size: cover;
body {
background："images 01.png"
background-repeat:no-repeat ;
background-size:100% 100%;
background-attachment: fixed;
}