html图片单张平铺

css:
.bg{  
background:url(http://wyz.67ge.com/wp-content/uploads/qzlogo.jpg);  
filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale')";  
-moz-background-size:100% 100%;  
    background-size:100% 100%;  
}

//id='bg',background='**.jpg'即可
js:
A=>

<div id="formbackground" style="position:absolute; width:100%; height:100%; z-index:-1">  
<img src="pictures/background.jpg" height="100%" width="100%"/>  
</div>

B=>

<div id="formbackground" style="position:absolute; z-index:-1;"><img src="10.jpg" height="100%" width="100%"/></div>

<script type="text/javascript">
$(function(){
$('#formbackground').height($(window).height());
$('#formbackground').width($(window).width());
});
</script>

html=>style:background-size:cover;

<style>

body{
font-size:12px;
font-family:"宋体";
background-image:url(../images/ntjh_bg.jpg);
background-repeat:repeat-x;
COLOR: #0C2B30;
}

</style>

这个是横向平铺
background-repeat:repeat-y;
纵向平铺