> How to do I get PHP form submit results to open in Fancybox instead of opening in a separate page?

How to do I get PHP form submit results to open in Fancybox instead of opening in a separate page?

Posted at: 2014-12-18 
I have a single page website with a working contact form. When user clicks submit, they are taken to a new page, formsubmit.php, showing the results of their submission. What I want instead is to show the php results in Fancybox. I want to note that I am already using Fancybox for image galleries. I just don't know how to make my form submit to open PHP page in Fancybox. If solution involves JQuery, AJAX, please explain in detail what to do. Thanks so much.