I've got a site with a very simple contact form and a newsletter subscription form, each based on PHP and loaded into a Lightbox, working good so far. But as soon as the user interacts with the form (e.g. making an incomplete post), the Lightbox gets dropped and the user lands on a ugly non-formated page.
I need to have the hole form processed within the Lightbox, incl. errors and confirmations. PHP script and also type of Lightbox can be changed as long as layout and functionality stays the same.
Attention: Actual PHP script is commented in German!