http://www.snopes.com/military/fonda.asp --- that's a well-written article and a very good read. Shews there is some bogus misinformation in the "email", but it also shows there is much truth in parts of it as well.
Jane Fonda's exploits and words during that time and since are well documented. Those of you challenging the validity probably weren't around back then I suppose. Then again, some youngsters believe WWII and the lunar landing are both hoaxes.