I see why it doesn't work. Both are described as returning the height of an object. But Firefox is returning the height of the page as it would be displayed on it's own, IE is returning the height the frame reserves for drawing the object. Not quite the same thing.

I'm not sure what you can do to get around this. One idea would be to put the contents of the testContent file into a table or div that fills the entire page. Then pull the size of that. But I have no idea if that would actually work.

Jay