I have a asp.net web content from that have a asp.net textbox and I want to use Plugin/Validation but it is not working with me here is my code:

<%@ Page Title="" Language="C#" MasterPageFile="~/Master.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="IMAM_APPLICATION.WebForm1" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">


    <script src="js/jquery-1.4.1.js" type="text/javascript"></script>

    <script src="js/jquery.validate.js" type="text/javascript"></script>


    <script type="text/javascript">

        $(document).ready(function() {
        $.validator.addMethod("#<%=TextBox1.ClientID %>", function(value, element) {
            return this.optional(element) || /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,16}$/i.test(value);
        }, "Passwords are 8-16 characters with uppercase letters, lowercase letters and at least one number.");
});

    </script>

</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">

    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>



</asp:Content>