Javascript function doesn't get called - ASP.NET and UpdatePanel

Question

I have the following structure on a usercontrol that is loaded by a page (Parent UC):

<UpdatePanel>
  <UpdatePanel>
     .. In the codebehind, it loads a Child user control at runtime
  </UpdatePanel>
</UpdatePanel>

The UC has OnPageLoad registers a script.

ScriptManager.RegisterStartupScript(this, typeof(Page), "Load_" + this.ClientID, base.GetRegisterScript(this.ClientID), true);

The JS function never gets executed on async postbacks. If i remove the UpdatePanels, it works as expected

EDIT: Used this.GetType() instead of typeof(Page) but no luck

EDIT Again:

Matt - I tried to replace the typeof(Page) with the UC name. Here's the updated line:

ScriptManager.RegisterStartupScript(this, typeof(TemplateAreaTypeOne), "Load_" + this.ClientID, "...JS function here,,", true);

To clarify, the Page loads the Parent UC that has these UpdatePanels. The ParentUC then loads the ChildUC and the ScriptManager.RegisterStartuScript is used in teh ChildUC

EDIT

The markup has:

<script type="text/javascript">
//<![CDATA[
; findControl('PageLoadedHiddenTxtBox').value ='Set';OnLoadBegin('ctl00_WorkSpaceContent_ctlUnion1_ctlUnion1Child','Edit');OnLoadEnd('ctl00_WorkSpaceContent_ctlUnion1_ctlUnion1Child','Edit');
document.getElementById('ctl00_WorkSpaceContent_informationSummary').dispose = function() {
    Array.remove(Page_ValidationSummaries, document.getElementById('ctl00_WorkSpaceContent_informationSummary'));
}
//]]>
</script>

Note that the functions that are called are the OnLoadBegin and OnLoadEnd that have been added to the HTML

EDIT AGAIN

Got it to work using:

ScriptManager.RegisterStartupScript(this.Page, typeof(Page),....)

Not sure why it works when I use the reference to the Page.

1. Will this work if I have multiple controls on the Page?
2. Why does it work when I use a reference to the page?

Answer 1

your registerstartupscript needs to target the control NOT the page dont use typeof(Page)