*{margin:0;padding:0;}
li{ list-style:none;}
a{ text-decoration:none;outline: none}
img{ border:none; vertical-align:top; } 

#focus{ width:274px; height:350px;position:relative; overflow:hidden; background:#f2f3f9; margin:30px; }
#focus .focusN{ width:274px; height:350px; overflow:hidden;position:relative;}
#focus .focusN ul{height:350px;position:absolute;}
#focus .focusN ul li{float:left;width:274px;height:350px;overflow:hidden;}
#focus .focusN ul li img{ width:274px;height:350px; }
#focus .preNext{ position:absolute; width:22px; height:22px; cursor:pointer;}

.preNext{ background:url(../images/icon.png) no-repeat;} 
#focus .pre{ background-position:-1px 0; left:10px; top:160px;}
#focus .next{ background-position:-23px 0; right:10px; top:160px;}