0 (Zero) values are not accepted for required fields?

It is often best to create your own routine to check for correctly completed fields. It is a much more flexible approach.

By the way, which version of Acrobat are you using?

Tks George! In fact, I am using my own routine but (formField.value == '') was returning true for a field that the user typed 0 there.

Then, I tried formField.value.toString() == '' and it solved the problem.

Btw, I am using Acrobat Standard 9.0.0.

If you want to compare zero and a null character string, you should use the field's 'valueAsString' property for all the text type fields being tested and then you could just check all text fields or even non-button fields with the same field property.

I see but is there any difference between valueAsString and value.toString()?

The valueAsString property will pickup the value as entered and not formatted. This becomes helpful when one wants to retain leading zeros for values being used in other calculations.

You're right, thank you. But in this particular case as I am testing empty string, won't make any difference, right!? :)

It will not make a difference. I wrote a generalized function to check for the 'required' property and used the the 'valueAsString' for all the text fields, it just made the function simpler and I did not need to know anything else about the field except that it was a text field.