How To Retrieve Form Validation errors?

[eluser]landitus[/eluser]
Hi!, I'm looking into this Ajax form submit but cannot find a complete tutorial which uses CI validation and enhances the CI form submit process. There are bits and pieces in the forum but cannot figure it out.

a. I don't understand if it's possible to return validation errors for each field separately with Ajax and JSON. I'm using

Code:

<?php echo form_error('name'); ?>

under every field so the errors show in place. Can this be enhanced with AJAX.

b. Do you know any post or tutorial where I can see the full MVC and the jQuery code of an ajax enhanced contact form with validation errors?

Thanks!