function resetAll() {
	document.getElementById('Über Lions').style.display = "none";	
	document.getElementById('Über unseren Club').style.display = "none";
	document.getElementById('Aktivitäten').style.display = "none";
	document.getElementById('Termine').style.display = "none";
		
	document.cookie = 'Über Lions=none; path=/;';
	document.cookie = 'Über unseren Club=none; path=/;';
	document.cookie = 'Aktivitäten=none; path=/;';
	document.cookie = 'Termine=none; path=/;';
}

function showBlockNavi(id) {
	if (document.getElementById(id).style.display == 'none' || document.getElementById(id).style.display == "") {
		resetAll();
		
		document.getElementById(id).style.display = "block";
		document.cookie = id+'=block; path=/;';
	} else {
		document.getElementById(id).style.display = "none";
		document.cookie = id+'=none; path=/;';
	}
}

function getCookieVal(offset) { 
	var endstr = document.cookie.indexOf (";", offset); 
	if (endstr == -1) 
		endstr = document.cookie.length; 
	return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie(name) { 
	var arg = name + "="; 
	var alen = arg.length; 
	var clen = document.cookie.length; 
	var i = 0; 
	while (i < clen) { 
		var j = i + alen; 
		if (document.cookie.substring(i, j) == arg) 
			return getCookieVal(j); 
		i = document.cookie.indexOf(" ", i) + 1; 
		if (i == 0) break; 
	} 
	return "none";
}

window.onload = function() {
	document.getElementById('Über Lions').style.display = GetCookie('Über Lions');	
	document.getElementById('Über unseren Club').style.display = GetCookie('Über unseren Club');
	document.getElementById('Aktivitäten').style.display = GetCookie('Aktivitäten');
	document.getElementById('Termine').style.display = GetCookie('Termine');	
}