The Class you prepared is really interesting, but I can't access to the tutorials:
Forms With Ajax And Advanced Plugins,
Formulários Web em PHP com plug-ins avançados e AJAX,
Presentation Formulários Web em PHP com plug-ins avançados e AJAX
(I click in them, but nothing happens), and the "PHP Forms Generation and Validation tutorial" (in YouTube) has a very low sound.
Can you be so kind and give me solution. I thank you very much in advance.