.change() question flexbox and validation

.change() question flexbox and validation

Hello all

I am using the flexbox and validation plugins.  They work well together.  However, I'm trying to manually validate the flexbox hidden textfield without success.

code:
  1.         $('#incubation_location_input').change(function(){
  2.               alert($(this).val());
  3.         });

That only fires when the text is being changed by the keyboard.  I would like it to fire when the text is being changed dynamically.  The incubation_location_input is a hidden field where its value changes by clicking the value from the flexbox dropdown. So, I'm assuming the change code that I have will not work because the value is not getting changed from the keyboard, am I wrong?  How do I listen to the #incubation_location_input when the value is getting changed dynamically?

-Thank You
Rich