2 forms on 1 page that need to be dynamic

This will be easy for anyone who has an understanding of web design, PHP, Javascript/jQuery/AJAX. I have a website that has PHP page with two forms on it. The forms are managed with CRM software called Infusionsoft. Right now if the submit button is pressed, Infusionsoft loads the thank [login to view URL] page. This is where you come in. The PHP page has two separate forms. I need those two separate forms to become dynamic so the user can hit submit, the entire page won't reload and the area that holds the form only reloads with the thank [login to view URL] page - this goes the same for the other form. I need each form to be independent from the primary PHP page as well as the other form. I would like whatever language is used to fade in the thank you page. I've seen this on other sites and like the effect. I will attach the necessary files upon choosing a coder.