[Zope] concatenate string and number

Please, help me! How can I concatenate string and number in Zope in DTML method? For example, 'id' and sequence-number when 'id' is string. I have tried to use + and &, but it doesn't work. Does anyone have advice for me? porky ------------------------------------------------------------------------------- http://www.one.lv - Tavs mobilais e-pasts! Tagad lasi savu e-pastu ar mobilo telefonu - wap.one.lv!