the page loaded into the iframe is a completely separate entity, and has nothing to do with the page in the main frame.
While they can communicate using cookies and Javascript, that's not recommended (just as the use of iframes is not recommended, and in fact in the latest html standard they've been removed).
No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.