how to control submit button while entering/updating addresses on checkout page


could anyone tell me how to control submit button (which having value continue) while updating/entering addresses of shipment and billing on checkout page…

Actually i want to validate the address via ups before submit the shipment and billing data to Ajax…

And i already checked the core.js and ajax.js but i didn't find the exact code where i put the conditions to control that button before validation done via ups street validation

please see the attachment image and red arrow on it for understanding

checkout page.png

What's going to kick off your request to UPS if you disable the button?

Are you planning to adjust the address the customer entered based on the response? If so, this will make many customers VERY uncomfortable that the system is changing info underneath them.