.round_corner .b2 {background:#8E8E8E; border-left:1px solid #fff; border-right:1px solid #eee;}
.round_corner .b3 {background:#8E8E8E; border-left:1px solid #fff; border-right:1px solid #ddd;}
.round_corner .b4 {background:#8E8E8E; border-left:1px solid #fff; border-right:1px solid #aaa;}
.round_corner .b4b {background:#8E8E8E; border-left:1px solid #eee; border-right:1px solid #999;}
.round_corner .b3b {background:#8E8E8E; border-left:1px solid #ddd; border-right:1px solid #999;}
.round_corner .b2b {background:#8E8E8E; border-left:1px solid #aaa; border-right:1px solid #999;}