Should I check the cell contents as a string and extact any text like,
f1 etc., and then check the remaining string with isdate?

Something like that maybe?

Ron Rosenfeld wrote:
On Mon, 18 Sep 2006 12:28:01 -0700, Tom Ogilvy
wrote:

I'll let Ron give you a regular expressions solution since he will whether I
answer or not.

And I was hoping you'd answer with a non-regular expression solution :-)
--ron