Thanks so much for all your help. I'm no expert in this "stuff" but my function calls to objects in an IFRAME did not work on IE, did everywhere else. Some of the techniques suggested here did not seem to work, others were a bit too complicated for me to follow.

A litte extra searching turned up this link:
http://www.dyn-web.com/tutorials/iframes/

And this interesting info:
(accessing IFRAME...