function checkForm(form){
if((form.naam.value=="")||
(form.email.value=="")||
(form.adres.value=="")||
(form.postcode.value=="")||
(form.plaats.value=="")||
(form.land.value=="")||
(form.cap.value=="")||
(false)){
	  alert("Not all required fields are used!")
	  return false;
	}else{
	  return true;
	}
}