asp.net content pages and jquery plugins

[delvin]

I am having issues with using the jQuery masked input plugin within a content page. It works fine in a normal web form but does not recognise the plugin within a content page.this is the plugin: http://digitalbush.com/projects/masked-input-plugin/here is a basic sample content page :\[code\]<%@ Page Title="" Language="C#" MasterPageFile="~/site.Master" AutoEventWireup="true" CodeBehind="masterContent.aspx.cs" Inherits="Dating.TEST.masterContent" %><asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"> <script src="http://stackoverflow.com/questions/js/jquery-1.8.2.min.js" type="text/javascript"></script> <script src="http://stackoverflow.com/questions/js/jquery.maskedinput-1.3.js" type="text/javascript"></script> <script type="text/javascript"> $(document).ready(function () { //$('#<%= TextBox3.ClientID %>').mask("(999) 9999-9999"); $("#TextBox3").mask("(999) 9999-9999"); }); </script> </asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <asp:TextBox ID="TextBox3" runat="server" ClientIDMode="Static"></asp:TextBox> </asp:Content>\[/code\]when i debug this i get this error : "Uncaught TypeError: Object [object Object] has no method 'mask'"I have tried everything i can think of but it only seems to work in webforms.