Damn, this is almost what I was looking for earlier.
I was trying to figure out how to tell when an iframe's document size changed (because, for instance, a $(node).show() was called), in order to adjust a custom html-and-js powered scrollbar.
I tried doing that in 2001, it was aweful. Have you got it solved yet? I was thinking about this because the other day I was trying to intercept child scrolling events on mobile OS.
I was trying to figure out how to tell when an iframe's document size changed (because, for instance, a $(node).show() was called), in order to adjust a custom html-and-js powered scrollbar.