老师，指点一下，谢谢
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>toggle()方法绑定多个函数</title>
<script src="http://libs.baidu.com/jquery/1.8.2/jquery.js" type="text/javascript"></script>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<h3>toggle()方法绑定多个函数</h3>
<input id="btntest" type="button" value="点一下我" />
<div>我是动态显示的</div>
<script type="text/javascript">
$(function () {
$("#btntest").bind("click", function () {
$("div").toggle(function(){$(this).css("display","none")},function(){$(this).css("display","block")})
})
});
</script>
</body>
</html>
老师，麻烦您看看我这段代码，哪里错了，运行不了
