window.onload event handler not firing on web page (AJAX BETA 2)

Any help on this one would be greatly appreciated. I'm new to Ajax and hopefully this will be a simple fix - i'm probably missing something obvious.

I have a simple website with a master page : SiteMaster.master. Inside here I've referenced the ScriptManager component
I've a simple content page which references the ScriptManagerProxy to include its own custom javascript - note no event handlers or listeners in here

The master page contains a number of controls that need to be resized immediately after the page loads and also when the page resizes

<asp:ScriptManagerID="smDefaultMaster"runat="server"EnablePartialRendering="true"ScriptMode="Release">
<Scripts>
<asp:ScriptReferencePath="~/Scripts/siteMaster.js"/>
</Scripts>
</asp:ScriptManager>

In the siteMaster.js I have 2 functions defined and I add handlers for these as per the new Sys.Dom.UI.AddHandler Methods in Beta 2. For some reason the pageLoaded event is never raised. The resize event works fine. Am i doing things correctly or am i messing something up.

function

pageLoaded () {
alert ("Load");
}

function pageLoaded () {
alert ("Resize");
}

$addHandler (window,'load', pageLoaded);
$addHandler (window,'resize', pageResized);

In the docs onthis page, you can read this:

During ordinary page processing in the browser, thewindow.onload DOM event is raised when the page loads initially. Similarly, thewindow.onunload DOM event is raised when the page is refreshed or when the user navigates away from the page.

However,these events are not raised during asynchronous postbacks. To help youmanage these types of events for asynchronous postbacks, thePageRequestManager manages a set of events that are similar towindow.load and other DOM events, but that also occur for asynchronous postbacks. For each asynchronous postback, all page events in thePageRequestManager class are raised and any attached event handlers are called.

Maybe it does help you.

Greets,
Nils Gruson