[Zope] how do you do dynamic redirection?

I would like to redirect a user based upon a variable. <dtml-call "RESPONSE.redirect(/target?myvariable=xyz)"> raises a syntax error. Does the redirect command only take literals? ------- Regards, Graham Chiu gchiu<at>compkarori.co.nz http://www.compkarori.com/dynamo - The Homebuilt Dynamo http://www.compkarori.com/dbase - The dBase bulletin