var contacto = contacto || [];
contacto.name_err = 'Name / surname cannot be blank';
contacto.mail_err1 = 'E-mail cannot be blank';
contacto.mail_err2 = 'E-mail must be valid';
contacto.text_err = 'Message cannot be blank';
contacto.msg_ok = 'Message sent correctly';
contacto.msg_err = 'Error sending message';