How to navigate to the field based on the value of other field

Hello,

I am a FM novice. I work with Filemaker Pro 10 and here is my problem:

I have a field where one can choose the value from the value list. Values are "YES" and "NO".

My goal is to create the script which will navigate the person to the other specific field if he/she chooses "YES".

As far as I understand this, I need to tell the FM that my "YES" in value list is certain number and then tell FM in script that if the Field matches this number then go to the field...

But how to tell the FM the first text value in the valuelist is some value (number etc.)...

Of course, any other suggestion/solution is welcomed.

Thanks!