// Standartni JavaScripts
function showhide(_event, _this, _tag) {
  var pole = _this.getElementsByTagName(_tag);
  // Nastaveni menu
  if (pole[0])
    if (pole[0].style.display == "none")
      pole[0].style.display = "block";
    else  
      pole[0].style.display = "none";

  // -- Projedem menu a nastaveni ulozime do cookies
  var menu = 'MENU';
  var items = document.getElementById(menu).getElementsByTagName('UL');
  var susenka = '';
  for (var i=0; i<items.length;i++) { 
    if (items[i].style.display != 'none')
      susenka += '{' + i + '}'; 
  } 
  document.cookie = 'jMenuStav=' + susenka ;

  // -- zamezeni probublavani a tak.
  _event || (_event = window.event);
  if (_event.preventDefault) {
    _event.preventDefault();
    _event.stopPropagation();
  } else {
    _event.cancelBubble = true;
    _event.returnValue = false;
  }
  return false;
}