public function initialize()
{
$email = new Text('email');
$email->addValidator(new PresenceOf());
$email->addValidator(new EmailValidator());
$email->setAttribute('placeholder', '*****@*****.**');
$email->setAttribute('class', 'col-xs-12');
$email->setLabel($this->i18n->_('Email'));
$this->add($email);
$password = new Password('raw_password');
$password->addValidator(new PresenceOf());
$password->setLabel($this->i18n->_('Password'));
$password->setAttribute('class', 'col-xs-12');
$this->add($password);
$rePassword = new Password('repassword');
$rePassword->addValidator(new PresenceOf());
$rePassword->setLabel($this->i18n->_('Re-type Password'));
$rePassword->setAttribute('class', 'col-xs-12');
$this->add($rePassword);
}