function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

var nodeArray=new Array();
var openedMenuCookieName="openedmenus";

var openedMenu = 1;
var openedMenuString =  readCookie(openedMenuCookieName);
if(openedMenuString) {
 var openedMenu=openedMenuString.split(',');
}


function saveOpenedNodes(clickedNodeId) {
 var curNode=nodeArray[clickedNodeId];
 var openedNodeList='';
 while(curNode.parent) {
  openedNodeList += ',' + getElementIndexInArray(nodeArray,curNode);
  curNode = curNode.parent;
 }
 createCookie(openedMenuCookieName,openedNodeList.substring(1),1);
}

//megvizsgálja, hogy az adott tömb tartalmazza-e az adott elemet
//ha igen, akkor az elem indexével tér vissza, egyébként -1-gyel
function getElementIndexInArray(array, element) {
 if(array) {
  for(i in array) {
   if(array[i]==element) {
    return i;
   }
  }
 }
 return -1;
}