And it looks like the page you linked to was made in '96...
I just remember that IE v.5 was the first one where iframes actually behaved they way they should have consistently. I had problems with IE 3 and IE 4 (and netscape just ignored them entirely).
--edit: A
much more concise/detailed look at the attributes of iframe.
[ July 31, 2003, 00:43: Message edited by: Will ]