#bg_wrap {position:relative; overflow:hidden; height:602px; background:#000;}
#bg_box {position:absolute; top:0px; width:1920px; height:602px; }

.clsBannerButton {position:absolute; top:25px; width:100px; cursor:pointer; z-index:10;}
.clsBannerButton li {width:10px; float:left; margin-right:20px;}

.clsBannerScreen .images:first-child {display:block;}