.asense-top{width:900px;margin:18px auto;text-align:center;position:relative;background:#1d1d1d;padding-top:3px}.asense-bottom{width:900px;margin:15px auto;text-align:center;position:relative;background:#1d1d1d;padding-top:3px}.asense-left{position:absolute;background:red}.asense-right{position:absolute;right:0;top:0;background:blue}