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找了半天不知道問題出現(xiàn)在哪里？求指點(diǎn)

<!DOCTYPE?html>
<html>
????<head>
????????<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
????????<title>挑戰(zhàn)題</title>
????????<script?src="http://libs.baidu.com/jquery/1.8.2/jquery.js"?type="text/javascript"></script>
????</head>
????<body>
????????<table?id="tab1">
????????????<tr>
????????????????<th>編號</th>
????????????????<th>姓名</th>
????????????????<th>年齡</th>
????????????????<th>性別</th>
????????????????<th>班級</th>
????????????</tr>
????????</table>
?????<script?type="text/javascript">
????????var?stus?=?[
????????????{name?:"tom",age?:"18",sex?:"男",classId?:"1"},
????????????{name?:"jack",age:"29",sex?:"男",classId?:"1"},
????????????{name:"mary",age:"17",sex:"女",classId:"2"},
????????????];
????????
????????$(function(){
????????????$.each(stus,function(index,stu){
????????????????$("#tab1").append(
????????????????????"<tr><td>"+parseInt(index+1)+"</td>"+
????????????????????"<td>"+stu.name+"</td>"+
????????????????????"<td>"+stu.age+"</td>"+
????????????????????"<td>"+stu.sex+"</td>"+
??????????????????????"<td>"+stu.classId+"</td></tr>"+
????????????????????);
????????????});
????????});
????</script>
????</body>
</html>