contact button behavior

In the process of customizing the product page contact button system I have managed to get the contact button (from 'display a contact button on the product page') to open up the contact form in a modal window (component.php with its own styling), present the exact form we need, and send from a customized email template. There is just one task remaining and I am stuck. When you hit 'send' (previously 'OK') the modal window loads the full home page of the site with relevant message into the modal window itself. I would like for just the relevant message to load into the modal window after submitting the form. How can this be done?

-- url of the page with the problem -- : www.destroyallguitars.net/index.php/guit.../category_pathway-14
-- HikaShop version -- :2.1.1
-- Joomla version -- : 3.0.3
-- PHP version -- : 5.3.24
-- Browser(s) name and version -- : any browser
-- Error-message(debug-mod must be tuned on) -- : none

Perfect. I really wasn't expecting it to be that easy. Thank you!