var reg = new RegExp('^menu\-holder.*$','i');
	for(i=0; i < holders.length; i++) {
		if (aktivniID.slice(0,holders[i].length)!=holders[i]) {
			document.getElementById('menu-holder'+holders[i]).style.display = 'none';
		}
	}
	otevreneID=aktivniID.slice(0,aktivniID.length-1);

	function openMenu(ID) {
		if (otevreneID.length>ID.length) {
			for (x=ID.length; x <= otevreneID.length; x=x+2) {
//				alert('case 1: zaviram menu-holder'+otevreneID.slice(0,x));
				document.getElementById('menu-holder'+otevreneID.slice(0,x)).style.display = 'none';
			}
		}
		else if (otevreneID.length==ID.length) {
//			alert('case 2: zaviram menu-holder'+otevreneID);
			document.getElementById('menu-holder'+otevreneID).style.display = 'none';
		}
		document.getElementById('menu-holder'+ID).style.display = 'block';
		otevreneID=ID;
	}