实现的功能就是当点击左边的“增加Tab”菜单后会不断的增加新的tab页，再次记录，以便后用！
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<link rel="stylesheet" type="text/css" href="css/ext-all.css">
<script type="text/javascript" src="js/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="js/ext-all.js"></script>
<title>Insert title here</title>
</head>
<body>
<script>
var index = 0;
</body>