function validate_RMA_fi()
{
  var valid = true;
  var nonempty = ['name','address','email','tel','serial','PO','POdate','problem'];
  for (i in nonempty) {
    if (document.getElementById(nonempty[i]).value == "") {
      document.getElementById(nonempty[i]).style.backgroundColor = '#ffc0c0';
      valid = false;
    } else {
      document.getElementById(nonempty[i]).style.backgroundColor = '#e8e8e8';
    }
  }
  if (!valid) {
    alert ( "Nimi puuttuu" );
    return false;
  } else {
    return true;
  }
}