background images and nsIWebProgressListener

[Erik Walter]

I don't seem to get notified when the background image of the body gets 
finished rendering.  I get notified of all the OTHER images in the 
document, but not the body background.

I'm using a nsIWebProgressListener to listen for progress of the load 
and then have an nsIDOMEventHandler set up for the "load" event.  But 
later I change the images in the document and I need to find out when 
the reload works (is there another event that will tell me this?)