#focus { width: 100%; overflow: hidden; clear: both; position: relative; float: left;}
#focus .btn { position:absolute; z-index:2; width:100%; height:4px; line-height:0;right:0; bottom:10px; padding-right:10px; text-align:right}
#focus .btn span {display:inline-block; _display:inline; _zoom:1; width:18px; height:4px; line-height:4px; font-size:0px; background:#fff; margin-right:5px; cursor:pointer; }
#focus .btn span.on {background:#f39800;}