function toggleMenu(i) {

if (i == null)
{
	if (navigator.cookieEnabled == true) {
		} else if (navigator.cookieEnabled == false) {
		alert("Um diese Website korrekt anzuzeigen schalten Sie bitte die Cookies in Ihrem Browser ein!");
		} else {
		alert("Verrate ich nicht.");
	}
}

var layers=document.getElementsByTagName("ul");

if (document.cookie) {
  clickedMenu = document.cookie;
  clickedMenu = clickedMenu.substr(clickedMenu.search('=')+1);
  clickedMenu = 2*clickedMenu-1;
} else {
  clickedMenu = null;
}

if (clickedMenu != null)
{
	layers[clickedMenu].style.visibility='visible';
}

if (i == null)
{
	return;
}

var menuNumber = i+i-1;

//layers[menuNumber].style.visibility='visible';

var toClose = 1;

while (layers[toClose]!=null)
{
	if(toClose != menuNumber && toClose != clickedMenu)
		{
		//layers[toClose].style.visibility='hidden';
		}
	toClose+=2;
}
}

function leaveMenuOpen(menuToStay)
{
	document.cookie = "menuToStay=" + menuToStay;
		var test1 = document.cookie;
}

function closeAllMenus()
{
	var toClose = 1;
	document.cookie = "menuToStay=" + 99;


	while (layers[toClose]!=null)
	{
		var layers=document.getElementsByTagName("ul");

		if(toClose < 10)
		{
		layers[toClose].style.visibility='hidden';
		}
		toClose+=2;
	}

}