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哪位大神能夠指點(diǎn)迷津？焦點(diǎn)圖不出來

<!DOCTYPE html>
<html>
?? ?<head>
?? ??? ?<meta charset="utf-8" />
?? ??? ?<link rel="stylesheet"? href="css/qwe.css" type="text/css"/>
?? ??? ?<script src="js/setHomeSetFav.js" type="text/javascript" charset="gb2312"></script>
?? ??? ?<script type="text/javascript" src="js/myfocus-2.0.1.min.js" charset="utf-8"></script>
?? ??? ?<script type="text/javascript" src="js/mf-pattern/mF_fancy.js" ></script>
?? ??? ?<link rel="stylesheet" href="js/mf-pattern/mF_fancy.css" type="text/css" />
?? ??? ?<script type="text/javascript">
?? ??? ??? ?myfocus.set({
?? ??? ??? ??? ?id:'picBox'
?? ??? ??? ?})
?? ??? ?</script>
?? ??? ?<title>導(dǎo)航</title>
?? ?</head>
?? ?<body>
?? ??? ?<div class="top">
?? ??? ??? ?<div class="top_content">
?? ??? ??? ??? ?<ul>?? ??? ??? ??? ?
?? ??? ??? ??? ??? ?<li><a href="#">聯(lián)系我們</a></li>
?? ??? ??? ??? ??? ?<li><a href="#" onclick="AddFavorite(window.location,document.title)">加入收藏</a></li>
?? ??? ??? ??? ??? ?<li><a href="#" onclick="SetHome(window.location)">設(shè)為首頁</a></li>?? ??? ??? ??? ??? ?
?? ??? ??? ??? ?</ul>
?? ??? ??? ?</div>?? ??? ??? ?
?? ??? ?</div>
?? ??? ?<div class="wrap">
?? ??? ??? ?<div class="logo">
?? ??? ??? ??? ?<div class="logo_left">
?? ??? ??? ??? ??? ?<img src="img/logo.jpg" alt="慕課網(wǎng)" />
?? ??? ??? ??? ?</div>
?? ??? ??? ??? ?<div class="logo_right">
?? ??? ??? ??? ??? ?<img src="img/tel.jpg" alt="服務(wù)熱線" />24小時(shí)服務(wù)熱線：<span class="tel">124-253-2353</span>
?? ??? ??? ??? ?</div>
?? ??? ??? ?</div>
?? ??? ??? ?
?? ??? ??? ?<div class="nav">
?? ??? ??? ??? ??? ??? ??? ??? ?
?? ??? ??? ??? ?<div class="nav_mid">
?? ??? ??? ??? ??? ?<div class="nav_mid_left">
?? ??? ??? ??? ??? ??? ?<ul>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">首頁</a></li>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">關(guān)于慕課</a></li>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">新聞動(dòng)態(tài)</a></li>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">課程中心</a></li>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">在線課程</a></li>
?? ??? ??? ??? ??? ??? ??? ?<li><a href="#">人才招聘</a></li>
?? ??? ??? ??? ??? ??? ?</ul>
?? ??? ??? ??? ??? ?</div>
?? ??? ??? ??? ??? ?<div class="nav_mid_right">
?? ??? ??? ??? ??? ??? ?<form action="" method="post">
?? ??? ??? ??? ??? ??? ??? ?<input type="text" class="search_text"/>
?? ??? ??? ??? ??? ??? ?</form>
?? ??? ??? ??? ??? ?</div>
?? ??? ??? ??? ?</div>
?? ??? ??? ?</div>
?? ??? ??? ?<div class="ad" id="picBox">
?? ??? ??? ??? ?<div class="loading"><img src="img/loading.gif" alt="圖片加載中"/></div>
?? ??? ??? ??? ?<div class="pic">
?? ??? ??? ??? ??? ?<ul>
?? ??? ??? ??? ??? ??? ?<li><img src="img/ad2.jpg"/></li>
?? ??? ??? ??? ??? ??? ?<li><img src="img/ad3.jpg"/></li>
?? ??? ??? ??? ??? ??? ?<li><img src="img/ad4.jpg"/></li>
?? ??? ??? ??? ??? ?</ul>
?? ??? ??? ??? ??? ?
?? ??? ??? ??? ?</div>
?? ??? ??? ?</div>
?? ??? ?</div>?? ?
?? ??? ??? ??? ??? ?
?? ?</body>
</html>

CSS代碼

*{
?? ?margin: 0;
?? ?padding: 0;
?? ?font-size: 12px;
}

body{
?? ?background-color: #F5F5F5;
}
.top{
?? ?width: 100%;
?? ?height: 27px;
?? ?background: url(../img/top_bg.jpg) repeat-x: ;
}
.top_content{
?? ?width: 1000px;
?? ?margin: 0 auto;?? ?
}
.top_content li{
?? ?list-style-image: url(../img/li_bg.gif);
?? ?float: right;
?? ?width: 70px;
?? ?line-height: 27px;
}
.top_content a:link,.top_content a:visited{
?? ?color: #8E8E8E;
?? ?text-decoration: none;
}
.top_content a:hover,.top_content a:active{
?? ?color: #900;
?? ?text-decoration: none;
}
.wrap{
?? ?width: 1000px;
?? ?margin: 0 auto;
}

.logo{
?? ?height: 80px;
?? ?background-color: #FFFFFF;
}

.logo_left{
?? ?width: 200px;
?? ?float: left;
}

.logo_right{
?? ?width: 300px;
?? ?float: right;
?? ?height: 28px;
?? ?margin-top: 30px;
}
.logo_right img{
?? ?vertical-align: middle;
?? ?margin-right: 10px;
}

.tel{
?? ?font-family: "微軟雅黑";
?? ?font-size: 16px;
?? ?color: #C00;
}
.nav{
?? ?height: 40px;
}

.nav_mid{
?? ?width:1000px;
?? ?background:url(../img/nav_bg.jpg)repeat-x;?? ?
?? ?float: left;
?? ?height: 40px;
}

.nav_mid_left,.nav_mid_right{
?? ??? ?
?? ?float: left;
}
.nav_mid_left{
?? ?width: 700px;
}
.nav_mid_right{
?? ?width: 300px;
}
.nav_mid_left li{
?? ?width: 100px;
?? ?list-style-type: none;
?? ?float:left;
?? ?text-align: center;
?? ?line-height: 40px;
}
.nav_mid_left a:link,.nav_mid_right a:visited{
?? ?text-decoration: none;
?? ?color:#FFF;
?? ?font-size: 16px;
?? ?font-family: "微軟雅黑";
?? ?
}
.nav_mid_left a:hover,.nav_mid_right a:active{
?? ?text-decoration: none;
?? ?color: gold;
?? ?font-size: 16px;
?? ?font-family: "微軟雅黑";
}
.search_text{
?? ?width:190px;
?? ?height: 25px;
?? ?margin-top: 5px;
?? ?background:url(../img/search.jpg) no-repeat right center;
?? ?background-color: #FFF;
?? ?padding-right: 25px;
?? ?border: 1px solid #FFF;
}
.ad{
?? ?height:310px;
?? ?overflow:hidden;
}