var alertVoorletter = 'Please fill in your initials';var alertAchternaam = 'Please fill in your surname';var alertBedrijf = 'Please fill in your company';var alertAdres = 'Please fill in your address';var alertPostcode = 'Please fill in your postal code';var alertPlaats = 'Please fill in your city';var alertLand = 'Please fill in your country';var alertEmail = 'Please fill in valid E-mail address';