[Zope] set variable for a user/cookie?

hi there, NFGNav uses a variable to switch languages. it changes the variable in the submit string. since i use this string for other purpose i need a different solution. how do i set a var for a user for the complete session? would cookies solve my problem? where do i find know-how to set a cookie and work with it (never done that?)? where do i find examples? thanks guys olaf -- soli-con Engineering Zanger Dipl.-Ing. (FH) Olaf Marc Zanger Lorrainestrasse 23 3013 Bern / Switzerland Fon: +41-31-332 9782 Mob: +41-76-572 9782 mailto:info@soli-con.com mailto:olaf.zanger@soli-con.com http://www.soli-con.com