[Zope] Dynamic ordering of DTML-IN?

Another one from the "my brain don't work" side of the tracks: I have a staff list that I want to be orderable by first or last name. So I have buttons for each that link thus: <a href="staff?orderby=firstname"> etc The idea is that that feeds over to the DTML-IN tag thus: <dtml-in "sql_search(search='foo')" sort=orderby> But this barfs, because it's expecting a field name "orderby" and there isn't one. How do I evaluate that? ---------------------- Andy Gates, Learning and Research Technology Andy.Gates@bristol.ac.uk - ICQ#74362415 http://www.ilrt.bristol.ac.uk