.wrapper {width:100%; height:100%; position:relative;}

#focus {width:100%; height:100%; overflow:hidden; position:relative;}

#focus ul { height:100%; position:relative;}

#focus ul li{float:left; height:100%; text-align:center; position:relative;}

#focus ul li img{max-width:100%; min-height:100%; max-height:100%;}

#focus .btnBg{position:absolute; width:100%; left:50%; margin-left:-50%; bottom:0; height:52px; background:#fff;}

#focus .btn {position:absolute; width:100%; left:0; height:12px; bottom:20px; text-align:center;}
#focus .btn span {display:inline-block; _display:inline; _zoom:1; width:10px; height:10px; border:solid #D5020B 1px; border-radius:10px; _font-size:0; margin:0 5px; cursor:pointer;}
#focus .btn span.on {background:#D5020B;}

#focus .preNext {width:45px; height:100px; position:absolute; top:50%; background:url(sprite.png) no-repeat 0 0; cursor:pointer;}
#focus .pre {left:50px;}
#focus .next {right:50px; background-position:right top;}