Split the form_validation to 2 parts

[eluser]eranbe[/eluser]
Hi all
I want to split the form_validation to first check the fields validity, print errors if there are any,
and only then continue to check my callbacks functions.

if I have a form_validation for log-in, I don't want to check for the username/password in the DB if the email is not valid...

Hope I managed to explain what I need,

Thanks