.r1{width:80px;height:80px;background:white;float:right;     
     position:fixed !important; top/**/:50px;     
     position:absolute; z-index:300; top:expression(offsetParent.scrollTop+50);right:40px;} 
.r2{width:80px;height:80px;background:white;float:right;     
     position:fixed !important; top/**/:10px;     
     position:absolute; z-index:400; top:expression(offsetParent.scrollTop+10);right:20px;} 
.l1{width:80px;height:80px;background:white;float:right;     
     position:fixed !important; top/**/:50px;     
     position:absolute; z-index:300; top:expression(offsetParent.scrollTop+50);left:40px;} 
.l2{width:80px;height:80px;background:white;float:right;     
     position:fixed !important; top/**/:10px;     
     position:absolute; z-index:400; top:expression(offsetParent.scrollTop+10);left:20px;}