.container { margin:0px auto; background:url(../images/BJ2.jpg) repeat-x; height:280px; width:100%}
.poster-main{ position:relative;width:680px;height:280px;}
.poster-main a,.poster-main img{display:block;}
.poster-main .poster-list{width:680px;height:280px;}
.poster-main .poster-list .poster-item{ position:absolute;left:0;top:0;}
.poster-main .poster-btn{ position:absolute;top:0;width:100px;height:270px; z-index:10; cursor:pointer;  opacity:0.8}
.poster-main .poster-prev-btn{left:0; background: url(../images/btn_l.png) no-repeat center center;}
.poster-main .poster-next-btn{right:0; background: url(../images/btn_r.png) no-repeat center center;}