1) I have registered dates in column O and P. The cell format is Date
dd.mm.yyyy in both columns. In a third column (cell format text) I
have this formula
=IF(O2TODAY();IF(P2<TODAY();"JA";"");"")
which I expected to return the text JA if todays date is between the
date in column O and P, and blank if it is not. But the formula
returns no value at all, only the formula-text.
What is wrong?

2) When I try to copy the formula down, O2 and P2 don't change to O3
and P3. The reason is that Excel don't consider the text as a formula,
I guess...

I changed semi-colons to commas in the above formula, and then it seems to
work properly.

(I have Excel 2003.)