[Zope] Alternating Cols or Colors

Does anyone know an elegant way (or a way at all) to alternate what color rows in a table are or to alternate which column a cell is on? A less-than-elegant solution would be to somehow assign a variable 1, check and see if it's on 1, show one color, set it to 2, show the second color, etc... But I'm not sure what I'm doing wrong with dtml-let to do that: <dtml-let c="1"></dtml-let> .. ? -- Ken Kinder 303.381.7631