[Zope] optional authentication

I would like, in one dtml document, to present different information to authenticated users and non-authenticated users. That's pretty simple. I would like for users who haven't yet authenticated though, be able to follow a link and provide their credentials, returning to the page mentioned above for the authenticated view. That's pretty simple using a document that requires authentication and then redirecting back to the first page. I'm wondering if there is an easier way (say calling a Zope function) to ask for the authentication credentials and return to the same page. -- Bryan C. Andregg Duke University Medical Center Programmer Dept. of Anesthesiology e <bryan.andregg@duke.edu> p +1 919 684 6201