Add Error While Ajax Validation

i have a form where i validate email address … email address are not in database… we use soap services… so i just send email address abd get response true or false… if true email exist and false email do not exist… i want to addError when it comes false so that form will npot get submitted untill it have true values.,…

and i also have client validation which can not check uniqueness of email…so how could i add error that "DO NOT ALLOW TO SUBMIT FORUM IF ALL DETAILS ARE RIGHT BUT EMAIL ADDRESS ALREADY EXIST IT SHOuld not allow to submit."

Hi please see it i hope it’s some help

thanks it is working…