function activate(elm,big) {
  elm.style.color = '#224f63';
  if (big)
    elm.style.background = "url('/grafika/left_menu_selected_big.png')";
  else
    elm.style.background = "url('/grafika/left_menu_selected.png')";
}

function deactivate(elm,big) {
  elm.style.color = '#fff';
  if (big)
    elm.style.background = "url('/grafika/region_odrazka.png') no-repeat 3px 8px";
  else
    elm.style.background = "transparent";
}

function napiste_deactivate() {
  document.getElementById('napiste_menu').style.display = 'none';
}

function napiste_activate() {
  document.getElementById('napiste_menu').style.display = '';
}