<%@ Page Language="C#" %>"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> Show UpdateProgress <%= DateTime.Now.ToString("T") %> id="btnSubmit" Text="Submit" Runat="server" OnClick="btnSubmit_Click" /> ID="progress1" AssociatedUpdatePanelID="up1" runat="server"> id="imgProgress" ImageUrl="~/Images/Progress.gif" Runat="server" /> Retrieving content...