.clearfix:after {content: "."; display: block; height: 0; clear: both; visibility: hidden;}
.clearfix {zoom:1;}
ul,li {list-style:none;}
img {border:0;}

.wrapper {width:600px; margin:0 auto; padding-bottom:50px; margin-top:20px;}
#focus {width:600px; height:450px; overflow:hidden; position:relative;}
#focus ul {height:600px; position:absolute;  text-align:center; margin: 0 auto; line-height:600px; padding:0;}
#focus ul li { width:600px;float:left; height:400px; overflow:hidden; position:relative; background:#fff; margin: 0 auto; }
#focus ul li img {max-width:600px; width:auto;height:auto; max-height:400px;vertical-align: middle;}
#focus .btnBg {width:600px; position:absolute; height:20px; left:0; bottom:0; background:#000;}
#focus .btn {width:600px; position:absolute; height:10px; padding:5px 10px; right:0; bottom:0; text-align:right;}
#focus .btn span {display:inline-block; _display:inline; _zoom:1; width:25px; height:10px; _font-size:0; margin-left:5px; cursor:pointer; background:#fff;}
#focus .btn span.on {background:#fff;}
#focus .preNext {width:45px; height:100px;  position:absolute; top:150px; cursor:pointer;background:url(../Images/sprite.png) no-repeat 0 0;}
#focus .pre {left:0;}
#focus .next {right:0; background-position:right top;}