                        课程
                    
                        /前端开发
                        
                            /HTML/CSS
                        
                        /企业网站综合布局实战

焦点图不能实现轮播，哪位大神帮忙看一下

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<link href="css.css" rel="stylesheet" type="text/css" />
    <script src="http://demo.jb51.net/js/myfocus/content/templates/myfocus/js/myfocus-2.0.1.min.js"></script>
    <script type="text/javascript">
        myfocus.set({
            id:'picBox'
        });
    </script>
</head>
<body>
<div class="wrap">
  <div class="logo">
      <div class="logo_left">
      <img src="素材/img/logo.jpg">
      </div><!--logo_left结束-->
      <div class="logo_right">
      <ul>
        <li><a href="#">首页</a></li>
        <li><a href="#">产品特色</a></li>
        <li><a href="#">解决方案</a></li>
        <li><a href="#">产品价格</a></li>
        <li><a href="#">帮助中心</a></li>
        <li><a href="#">关于我们</a></li>
      <ul>
    </div><!--logo_right结束-->
    <div class="ad" id="picbox">
      <ul>
        <li><img src="http://img1.sycdn.imooc.com//53edad3e0001afad10000318.jpg"></li>
        <li><img src="http://img1.sycdn.imooc.com//53edad2c0001b61310000314.jpg"></li>
        <li><img src="http://img1.sycdn.imooc.com//53edad1600019ae910000310.jpg"></li>
      </ul>
    </div><!--ad结束-->
  <div class="newspic"></div><!--newspic结束-->
  <div class="newscontent"></div><!--newscontent结束-->
</div><!--wrap结束-->
</body>
</html>

@charset "utf-8";
/* CSS Document */
*{
 margin:0;
 padding:0;
 }
.wrap{
 width:1000px;
 margin:0 auto;
 }
.logo{
 height:80px;
 background-color:#FFF;
 }
.logo_left{
 width:200px;
 float:left
 }
.logo_right li{
 float:left;
 width:100px;
 list-style-type:none;
 line-height:80px;
 text-align:center;
 }
.logo_right li a{
 display:block;
 font-size:16px;
 font-family:"微软雅黑";
 text-decoration:none;
 color:#000;
 }
.logo_right a:link,.logo_right a:visited{
    color: #000000;
    background-color: #FFFFFF;
}
.logo_right a:hover,.logo_right a:active{
    color:#000;
    background-color:#900;
}
.ad{
 width:1000px;
 height:320px;
    overflow:hidden;
 margin:5px 0 20px 0;
 }