根据不同分辨率加载不同 css 样芪表

<script language=javascript>
<!--
if (screen.width == 800)
{
document.write('<link rel=stylesheet type="text/css" href="css800.css">')
}
else {document.write('<link rel=stylesheet type="text/css" href="css1024.css">')}
//-->
</script>