#flashs{ position:relative; height:450px; overflow:hidden;}
#flashs .bgitem{  z-index:1;position:absolute; top:0; }
#flashs .btn{ position:absolute; z-index:7; bottom:2px; left:77%; text-align:center}
#flashs .btn span{ background:#000; cursor: pointer;display: inline-block;margin:0 2px;width:25px;height:25px;font-size:14px;line-height:25px;text-align:center;color:#fff;}
#flashs .btn span.on{  background:#D70007;}