UpdatePanel Client-Side Page Execution Lifecycle : UpdatePanel « Ajax « ASP.NET Tutorial

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Client Lifecycle</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server" />

        <asp:UpdatePanel ID="up1" runat="server">
        <ContentTemplate>
            <asp:Button ID="btnAsync" Text="Async Postback" runat="server" />
        </ContentTemplate>
        </asp:UpdatePanel>
        <asp:Button ID="Button1" Text="Normal Postback" runat="server" />

        <br /><br />
        <textarea id="TraceConsole" cols="60" rows="10"></textarea>

    </div>
    </form>
</body>
<script type="text/javascript">

  Sys.Application.add_init(application_init);

  function application_init()
  {
    Sys.Debug.trace("Application.Init");

    var prm = Sys.WebForms.PageRequestManager.getInstance();
    prm.add_initializeRequest( prm_initializeRequest );
    prm.add_beginRequest( prm_beginRequest );
    prm.add_pageLoading( prm_pageLoading );
    prm.add_pageLoaded( prm_pageLoaded );
    prm.add_endRequest( prm_endRequest );
  }

  function pageLoad()
  {
    Sys.Debug.trace("Application.Load");
  }

  function prm_initializeRequest()
  {
    Sys.Debug.trace("PageRequestManager.initializeRequest");
  }

  function prm_beginRequest()
  {
    Sys.Debug.trace("PageRequestManager.beginRequest");
  }

  function prm_pageLoading()
  {
    Sys.Debug.trace("PageRequestManager.pageLoading");
  }

  function prm_pageLoaded()
  {
    Sys.Debug.trace("PageRequestManager.pageLoaded");
  }

  function prm_endRequest()
  {
    Sys.Debug.trace("PageRequestManager.endRequest");
  }

  function pageUnload()
  {
    alert("Application.Unload");
  }

</script>
</html>

20.11.UpdatePanel
	20.11.1.	Using the UpdatePanel Control
	20.11.2.	Entering customer feedback into an Ajax-enabled form.
	20.11.3.	Specifying UpdatePanel Triggers
	20.11.4.	Nesting UpdatePanel Controls
	20.11.5.	Updating UpdatePanels Programmatically
	20.11.6.	UpdatePanels and JavaScript
	20.11.7.	Show Alert UpdatePanel
	20.11.8.	UpdatePanel Server-Side Page Execution Lifecycle
	20.11.9.	UpdatePanel Client-Side Page Execution Lifecycle
	20.11.10.	UpdatePanel Custom Progress