function showAndHide(toShow, toHide) {
  for (elt in toShow) {
    document.getElementById(toShow[elt]).style.display = 'table-row';
  }

  for (elt in toHide) {
    document.getElementById(toHide[elt]).style.display = 'none';
  }
}

function lookForOrderState() {
  var lookForForm = document.look_for_order_state;
  var textId = lookForForm.text_id.value;
  var pin = lookForForm.pin.value;
  
  var left = (screen.width / 2) - 200;
  window.open("http://videoolomouc.cz/evidence-zakazek/stav-zakazky.php?text_id=" + textId + "&pin=" + pin,
              "_blank", "width=400,height=360,left=" + left + ",top=100");
}