Determine DOM activity completed.

We are trying to determine when the DOM related activity pertaining to a 
document has completed. The 'DOMAttrModified' and 'DOMSubtreeModified' 
events are helpful, but they dont get triggered by DOM changes using the 
expando dot notation. Is there any scriptable interface with events that
can help us in this regard ?

The 'MozAfterPaint' event helped in cases where DOM activity caused the 
browser content to be changed. However, this event also gets triggered 
by any animated images on the page which is not what we need.

I also looked at an old bug 
https://bugzilla.mozilla.org/show_bug.cgi?id=286013. This talks about 
exposing an event "ValueChange". Is this something that is planned for 
the near future ? Would that be something that would help in determine 
the DOM value changes ?

Thanks