Drop down selection trigger change in text field

[FormNewbie]

I am hitting a roadblock here. I am on Adobe Acrobat XI and here is the scenario: I have a drop down and a text box.

Drop down field has 3 selections (A, B, C).

If A is selected, text box = 15 by default, but has the ability to be changed in the text box.

If B or C is selected, text box = 0 or '' by default, but has the ability to be changed in the text box.

If I use an if/then with a .value I will be able to get the numbers to work, but not have the ability to change them and keep them there. If I enter another number in a different field the JavaScript will run and change the text box back to 0 or 15.

Any help would be greatly appreciated.

Thank you

[try67 · Accepted solution]

Instead of using a calculation script for the text field, use the validation script of the drop-down. That way it will only be triggered when you change the value of the drop-down field, not when you change any field in the file (like the calculation script).

[FormNewbie]

Yes! Thank you so much for the timely response and the correct answer!