[Zope] Preserving Settings during a user's session

Zopesters, I'm trying to accomplish something and I can't figure out an elegant way to do it. I need to preserve variables, like State=CA or ID=5, throughout a user's session, unless I specifically change them in a page (i.e. I change ID=5 to ID=4). I can think of two methods: a. Passing all the values in the link syntax for all page links: <a href=page_name?ID=5&State=CA&Region=1&Tab=Guide>Link text</a> b. Storing the values in cookies. I'd prefer not to use cookies as this will be a public web site and some people have privacy concerns about cookies. Anybody got a better idea? Jeff jeffniel@ix.netcom.com P.S. I've been Zoping for about a month now. Zope Rocks!