Is there any way in cforms to validate a value of a field by values of two other fields? I am asking the 1st and 2nd name of the user at the beginning of the form and at the end he/she must attach a file which i want to be named this way: 1st-name_2nd-name_abstract. So i would like to check this filename structure during the submission by regex. I know i can use HTML IDs of the fields to check the retyping of an email address and i hope there is a similar way to do what i want now.

I have the fields cf16_field_2 and cf16_field_3 and would like to combine it with ^abstract$ to produce a checking string in the regexp line of that cforms field. Is it possible?

Thanks in advance!