Automatically open a dialog box

[Aur]

Hi, I came to discover visural through a post in Wicket's mailing list
in a discussion about solutions to have a
org.apache.wicket.extensions.ajax.markup.html.modal.ModalWindow open
automatically at page load.
I have looked at the com.visural.wicket.component.dialog.Dialog
component which might do the trick but I didn't see any info about
having it opened automatically, I see there's getOpenString() method
that I would have used to add the javascript to the page myself, but
it's protected.
Am I using the right component? What's the best way to do what I need?
Thanks!
Aur