> <a tal:attributes="href python:'Reports.py?doit&task_id=%s' %(taskid)"> > foo </a> Note that <a href="Reports.py?doit&task_id=bar">foo</a> is illegal (even if accepted by lots of browsers). You should use: <a href="Reports.py?doit&task_id=bar">foo</a> Florent -- Florent Guillaume, Nuxeo (Paris, France) +33 1 40 33 79 87 http://nuxeo.com mailto:fg@nuxeo.com