function validavacio (Ctrl) {
  if (Ctrl.value == "" || Ctrl.value.length == 0)
    return (true);
  else
    return (false);
}

function validaemail(Ctrl) {
  if (Ctrl.value == "" || Ctrl.value.indexOf ('@', 0) == -1 || Ctrl.value.indexOf ('.', 0) == -1)
    return (true);
  else
    return (false);
}