Catch server side event being called in PageRequestManager request

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C#

ASP.NET

Javascript

Ajax

Hi all,

I realise you can get the postbackelement of the ajax call request:

Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
    var elem = args.get_postBackElement();

Does anyone know if I can get the server side event it's trying to call also?

What I'm trying to acheive (might make more sense):

I have 2 update panels on a page, updatepanel1 has a gridview and the property 'ChildrenAsTriggers' set to false. UpdatePanel2 has been put in a hidden floating div (looks like a modal popup) and it's trigger has been set to GridView1.SelectedIndexChanged. I capture the element in PageRequestManager (beginrequest) and if it's the GridView then I show the div containing updatepanel2.

This is all working great until I want to allow sorting on the GridView which obviously shows updatepanel2 when I don't want it to. I need to somehow do:

function BeginRequestHandler(sender, args) {
    var elem = args.get_postBackElement();
    if (elem is GridView1 and event being called is selectedindexchanged)

However can not seem to easily find which event is being called.

Any help would be appreciated. Thanks

Gav