.net mvc2框架，简单jquery表单验证

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>   <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">     YzTest </asp:Content>  <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <script src="../../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script> <script type="text/javascript">     $(document).ready(function () {         $("#Form1").submit(function () {             var a = $("#Email").val();             var validate = true;             alert(a);             if (a == "") {                 validate = false;                 $("#DEmail").html("对不起，该选项不能为空");             }             else {                 var reg =/^(0|[1-9]\d*)$/;                 alert(reg.test(a));                 if (reg.test(a)) {                     if (a > 100 || a < 0) {                         alert("a");                         validate = false;                         $("#DEmail").html("年龄范围在0-100之间！");                     }                     else {                         $("#DEmail").html("");                     }                 }                 else {                     $("#DEmail").html("请输入数字");                     validate = false;                 }             }             return validate;         });     }); </script>     <h3>验证测试</h3>     <%using (Html.BeginForm("YzTest", "Home", FormMethod.Post, new { id = "Form1" }))       {%>     <table>     <tr>     <td>     (Email验证)     </td>     <td><input type="text" id="Email"/><div id="DEmail"></div></td>     </tr>     <tr><td><input type="submit" value="验证" /></td></tr>     </table>     <%} %>      </asp:Content>