[Zope] Logout with standard basic authentification

I have tried to logout with standard basic authentification, but I have not seen nothing in Mailing List. Only I have seen log out with cookie-based authentication, but i have to use standard authentification. I don't know how i can do it. What can I do to logout with standard basic authentification? Thanks -- Ismael Briones Vilar Administrador de Sistemas ibriones@amutis.com Amutis Telecomunicaciones S.A. Tlf: +34 96.353.67.67 Gran Vía Marqués del Turia, 27, 1 Fax: +34 96.353.53.58 46005 Valencia (Spain)