.banner{ width:100%; height:420px;}
.flexslider{position:relative;height:420px;overflow:hidden;z-index:50}
.slides{position:relative; z-index:1;}
.slides li{ height:420px;}
.slides li A{ height:420px; display:block}
.flex-control-nav{  position:absolute;bottom:10px; z-index:2; width:100%; _width:90%; text-align:center;}
.flex-control-nav li{display:inline-block;width:14px;height:14px;margin:0 5px;*display:inline;zoom:1; text-align:center;}
.flex-control-nav a{display:inline-block;width:14px;height:14px; line-height:40px;overflow:hidden; cursor:pointer;}
.flex-control-nav .flex-active{background-position:0 0;}
.flex-direction-nav{position: relative;z-index:3;width:100%;top:45%;}