Hi, could you please explain a bit what do you want to do ? These "form fields" are form properties http://www.activiti.org/userguide/#formProperties , or you have your own forms management and then you are the only one who knows the field definition ?
i have a form which contains two fields name and contact number, now if i want to write validation for name that it will contain only alphabetical and for contact number i want that it will contain only 10 digits ..tell me how to write validation in script task for the same..i tried javascript code for the same but it is not working.