*{margin:0;padding:0;}
.clearfix:after{content: ".";display: block;height: 0;clear: both;visibility: hidden;}
.clearfix{zoom:1;}
/* focus */
#focus{width:570;height:250px;overflow:hidden;position:relative;}
#focus ul{height:250px;position:absolute;}
#focus ul li{float:left;width:570;height:250px;overflow:hidden;position:relative;background:#000;}
#focus ul li div{position:absolute;overflow:hidden;}
#focus .btnBg{position:absolute;width:200px;height:20px;right:0;bottom:0;background:#000;}
#focus .btn{position:absolute;width:95px;height:10px;padding:5px 10px;right:0;bottom:0;text-align:right;}
#focus .btn span{display:inline-block;_display:inline;_zoom:1;width:20px;height:10px;_font-size:0;margin-left:5px;cursor:pointer;background:#fff;}
#focus .btn span.on{background:#fff;}
#focus .preNext{width:35px;height:40px;position:absolute;top:10px;background:url(img/sprite.png) no-repeat 0 0;cursor:pointer;}
#focus .pre{left:0;}
#focus .next{right:0;background-position:right top;}