Fast AJAX Contact Form is an jQuery based AJAX contact form that can be easily integrated into any HTML or PHP page. Plugin contains 1 javascript file, 1 CSS and 1 PHP file. You will need to edit only 1 line code (your email) to make plugin functional. Instructions are included in the readme.txt file.
Features include:
AJAX backend – no page reloads
Validation on all fields
FadeIn Success Page
Separate form style that you may integrate into the existing stylesheet