You're welcome, Bob !
Sample book sent over ..
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Rgds
Max
xl 97
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GMT+8, 1° 22' N 103° 45' E
xdemechanik <atyahoo<dotcom
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"Bob" wrote in message
...
Max,

Thank you very much for the great reply. I've just set up the sheets as
you
instructed, and it all looks very promising. I don't have the time right
now to experiment with it, but I should be able to do so within the next
couple days and will then let you know for sure how it works out.

I'm pretty sure I have correctly reconstructed your worksheets, but if the
offer is still open I'll take you up on the offer to send a sample book,
which you can send to rschwarz<atnetins<dotnet. Thanks again.

Bob