Get all Validation rules when submitting form

[eluser]wooptoo[/eluser]
First of all I need to mention that I'm using codeigniter-restserver to create an API and an application on top of it.

I want to enable live form validation in my application, client-side, with javascript.

You know that when you submit a form, if some fields fail validation, it will give you the error messages for those fields.
What I would like is for CodeIgniter to give me all the validation messages for a certain field, not just one message at a time. For example if I have 'required|valid_email|is_unique[bla.bla]' for the email field, I'd have to submit it three times to get all validation messages.

Is this possible at all?