function compare (field1, field2, l1, l2) {
  value1 = document.getElementById(field1).value;
  value2 = document.getElementById(field2).value;
  if (value1 != value2) {
    alert (l1 + " and " + l2 + " must match. Please correct.");
    document.getElementById(field2).value = '';
    document.getElementById(field1).focus();
    return false;
  } else {
    return true;
  }
}