.r1{width:9px;height:190px; position:fixed; top/**/:100px;  z-index:400; right:100px;}
/* 以下是写给IE6的 */ 
* html .r1{position:absolute;top:expression(offsetParent.scrollTop+100);width:90px;height:190px;z-index:400; right:20px;}  



.r2{width:180px;height:60px;background:#cccccc;float:right; position:fixed !important; top/**/:300px; position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);right:20px;}
.l1{width:9px;height:190px; position:fixed; top/**/:100px;  z-index:400; left:20px;}
* html .l1{position:absolute;top:expression(offsetParent.scrollTop+100);width:90px;height:190px;z-index:400; left:20px;} 
.l2{width:180px;height:60px;background:#cccccc;float:right; position:fixed !important; top/**/:300px; position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);left:20px;}

.v_bottom{width:320px;height:240px;background:#000; position:fixed; right:0px; bottom:0px; z-index:300;}
* html .v_bottom {position:absolute; right:0px; z-index:300;background:#000;top:expression(offsetParent.scrollTop+offsetParent.clientHeight-240);}