<style>
body{background:url(a.jpg) no-repeat top center;}
</style>
还有一种,根据分辩率来载入背景
<script language="javascript">
if((screen.width==1024)&&(screen.height==768)) {
document.write("<body background='b.jpg'>");
}
if((screen.width==1152)&&(screen.height==864)){
document.write("<body background='a.JPG'>");
}
</SCRIPT>
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