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position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);right:20px;}
.l1{width:80px;height:80px;background:red;float:right;
position:fixed !important; top:200px;
position:absolute; z-index:300; top:expression(offsetParent.scrollTop+200);left:20px;}
.l2{width:80px;height:80px;background:red;float:right;
position:fixed !important; top:300px;
position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);left:20px;}
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