怎么这个序列号不变的
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm45.aspx.cs" Inherits="WebApplication2.WebForm45" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript" src="jquery-2.1.4.min.js"> </script>
</head>
<body>
<input type="button" value="序列号" id="tb" />
<form id="form1" runat="server">
<div>
<input type="text" />
<span></span>
<script type="text/javascript">
$(function () {
$("#tb").bind("click", function () {
$("span").html($("form").serialize());
});
});
</script>
</div>
</form>
</body>
</html>
