function onoff (menuName) 
{
	if ((document.getElementById(menuName).style.visibility == '') || (document.getElementById(menuName).style.visibility == 'hidden'))
	{ 
		document.getElementById(menuName).style.visibility = "visible"; 
		off(menuName);
	}
	else { document.getElementById(menuName).style.visibility = "hidden"; }
}
	
function off (menuName)
{	
	if (menuName == 'rathaus') 
	{ 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
	}
	
	if (menuName == 'kinder') 
	{ 
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
	}
	
	if (menuName == 'senioren') 
	{ 
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
	}
	
	if (menuName == 'freizeit') 
	{ 
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
	}
	
	if (menuName == 'wirtschaft') 
	{ 
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
	}
	
	if (menuName == 'bauen') 
	{ 
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
	}
}

function divoff (menuName)
{	
	document.getElementById(menuName).style.visibility = "hidden"; 
}

function alldivoff ()
{	
			document.getElementById('rathaus').style.visibility = "hidden"; 
			document.getElementById('kinder').style.visibility = "hidden"; 
			document.getElementById('senioren').style.visibility = "hidden"; 
			document.getElementById('freizeit').style.visibility = "hidden"; 
			document.getElementById('wirtschaft').style.visibility = "hidden"; 
			document.getElementById('bauen').style.visibility = "hidden"; 
}

function divon (menuName)
{	
	document.getElementById(menuName).style.visibility = "visible"; 
}