function build_menu() {

  if (!$('menuId')) {
	   $$('#menuzone ul.menu')[0].setAttribute('id', 'menuId');
	   $$('#menuzone ul.menu ul.level1').each(function(level1) {
	     level1.getElementsBySelector("li ul.level2").each(function(level2) {
	       var relativeElement = level2.parentNode.nextSibling;
	       var li = level2.getElementsBySelector("li").reverse();
	       for (i = 0; i < li.length; i++) {
		        level1.insertBefore(li[i], relativeElement);
	  	      relativeElement = li[i];
	       }
	     });
	   });

	  Menu.init("menuId", {
	    "orientation" : Menu.HORIZONTAL,
	    "hidePause" : 0.2
	  });

	  var sirka = 0;
	  var vyska = 0;

		$$('#menuzone ul.menu li').each(function(item) {
	    if (item.parentNode.hasClassName('menu')) {
	      sirka = sirka + item.offsetWidth;
	      vyska = item.offsetHeight;

		     if (vyska > 50) item.style.display = 'none';
		     if (sirka > 750) item.style.display = 'none';
	    }
	  });
  }

}

function nav_lang_cleaner() {

  var navi = document.getElementById("pageNavigator");
	var lang = document.getElementById("languageSelect");
  if( navi.innerHTML == "" && lang.innerHTML == "" ) {
  	$('pageNavigator').style.display = 'none';
    $('languageSelect').style.display = 'none';
  }

}