jQuery Form Plugin & PHP

What is the difference between ajaxForm and ajaxSubmit?: http://malsup.com/jquery/form/#faq

Using: ajaxSubmit: http://malsup.com/jquery/form/#ajaxSubmit

Create a Simple and Secure Contact Form with jQuery Form and PHP: http://www.tutwow.com/htmlcss/create-a-simple-and-secure-contact-form-with-jquery-and-php/

jQuery Form Plugin & PHP