Focus a Silverlight control on startup

I found two solutions to this problem on the web and neither of them worked for me. I finally combined both of them to make it work:

In the aspx page, include

<script type="text/javascript">
    window.onload = function() 
    { 
        setTimeout(function() { document.getElementById('Xaml1').focus(); }, 1); 
    }
</script>

And then in Page.cs class as a response to Loaded event:

Dispatcher.BeginInvoke(delegate{myControl.Focus();});