.slider_box{width:940px;height: 370px; position:relative;}
.slider {width: 940px;height: 370px; overflow:hidden;}
.items {display:none}
.prev{ background:url(../images/slider_prev.png) 0 0 no-repeat; left:20px;}
.next{ background:url(../images/slider_next.png) 0 0 no-repeat; right:20px;}
.prev,.next{width: 80px; height: 80px; display:block; position:absolute; z-index:99; top:145px;}
.prev:hover{background:url(../images/slider_prev.png) 0 -80px no-repeat;}
.next:hover{background:url(../images/slider_next.png) 0 -80px no-repeat;}