Hi, I am doing a component where i have to date input fields, jform_start_contract and jform_end_contract, and i want to make some changes depending on the differences among this 2 fields (for instance if more than 6 months change default values for other inputs).

I try to find how to trigger the value change but i am not able.
For a single field i do easy by doing :
jQuery('#jform_project').change(function() {
alert('ha');
});

i tried with datepicker and onselect, but i have been not able.
any help?