I read SO for a while, but for the first time I am posting a question (the first time I cannot find the answer of what I am looking for)
Here is my setup:
Master Page:
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Master.master.cs" Inherits="VatechWebsite.Master" %>
<html>
<head>...</head>
<body>
<form>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
...
<asp:ContentPlaceHolder ID="content" runat="server">
</asp:ContentPlaceHolder>
</form>
</body>
</html>
Content Page:
<%@ Page Title="" Language="C#" MasterPageFile="~/Master.Master" AutoEventWireup="true" CodeBehind="Brand.aspx.cs" Inherits="VatechWebsite.Brand1" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<asp:Content ID="Content2" ContentPlaceHolderID="content" runat="server">
<asp:Accordion ID="CategoriesAccordion" runat="server" HeaderCssClass="AccordionHeader">
<HeaderTemplate><%# DataBinder.Eval(Container.DataItem, "CategoryName") %></HeaderTemplate>
<ContentTemplate>
<div id="ProductList">Some text<br />supposed to be very large <br/></div>
</ContentTemplate>
</asp:Accordion>
<asp:Content/>
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, ScriptManager asp ajax- , ?