[Zope] dtml-var expr=maand missing=1???

Hello, How can I use an undefined variable in an expression? I made a DTML document which gets parameters from the URL, like "/nieuw?maand=1". But I also want it to work when no parameters are given. 'Missing' should be the answer, but the following doesn't work: dtml-var

Re: [Zope] dtml-var expr=maand missing=1???

At 1/16/01 06:49 PM, Edwin Martin wrote: Hello, How can I use an undefined variable in an expression? I made a DTML document which gets parameters from the URL, like "/nieuw?maand=1". But I also want it to work when no parameters are given. How about dtml-unless maanddtml-call