> I am just wondering if it was done or there is an easy way..
As suggested by Kurt, given a subsequent index from idx = 1 ... N, you may
use color = idx%2 to compute your color.
To work around the problem of insert/delete, I'd try to employ a trigger on
these events to renumber the index (idx) first and then recompute the colors.
Cheers
Daniel
--
Dipl.-Math. (FH) Daniel Franke
Institut fuer Medizinische Biometrie und Statistik
Medizinische Universität zu Luebeck
Ratzeburger Allee 160, Haus 4
23538 Luebeck
Telefon: 0451-500-2786
Telefax: 0451-500-2999
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