DOM code with CRM

How do I upgrade this old on_sent_ok code to the new DOM code because I couldn’t find any instructions for the first part that goes to our crm?

on_sent_ok: “jQuery.ajax({ type : ‘POST’, url : ‘https://office.ourwebsite.com/crm/createCNTOP.php’,data : jQuery(‘.wpcf7-form.sent’).serialize(),success:function(data) { location=’https://ourwebsite.com/thankyou/’ ; } });”