/*
 * DO NOT REMOVE THIS NOTICE
 *
 * PROJECT:   mygosuMenu
 * VERSION:   1.2.0
 * COPYRIGHT: (c) 2003,2004 Cezary Tomczak
 * LINK:      http://gosu.pl/dhtml/mygosumenu.html
 * LICENSE:   BSD (revised)
 */

function TreeMenu(id) {

    this.init = function() {
        if (!document.getElementById(this.id)) {
            alert("Element '"+this.id+"' does not exist in this document. TreeMenu cannot be initialized");
            return;
        }
        this.parse(document.getElementById(this.id).childNodes, this.tree, this.id);
    }

    this.parse = function(nodes, tree, id) {
        for (var i = 0; i < nodes.length; i++) {		
            if (nodes[i].nodeType != 1) {
                continue;
            }			
            if (nodes[i].tagName.toLowerCase() == "li") {
                nodes[i].id = id + "-" + tree.length;
                tree[tree.length] = new Array();
                if (nodes[i].childNodes && this.hasUl(nodes[i].childNodes)) {
                    nodes[i].className = "section";						
                    var a;
                    if (a = this.getA(nodes[i].childNodes)) {
                        a.id = nodes[i].id + "-a";
                        eval("document.getElementById('"+a.id+"').onclick = function() {"+
                            "self.click('"+nodes[i].id+"');"+
                        "}");
                    }
                } else {
                    nodes[i].className = "box";
                }
            }
            if (nodes[i].tagName.toLowerCase() == "ul") {
                nodes[i].style.display = "none";
                id = id + "-" + (tree.length - 1);	
                nodes[i].id = id + "-section";									
                tree = tree[tree.length - 1];
            }
            if (nodes[i].childNodes) {
                this.parse(nodes[i].childNodes, tree, id);
            }
			if (getCookie(id)=='section-open') {
				document.getElementById(id + "-section").style.display = ""
	            document.getElementById(id).className = "section-open";						
			}			
        }
    }

    this.hasUl = function(nodes) {
        for (var i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeType != 1) {
                continue;
            }
            if (nodes[i].tagName.toLowerCase() == "ul") {
                return true;
            }
            if (nodes[i].childNodes) {
                if (this.hasUl(nodes[i].childNodes)) {
                    return true;
                }
            }
        }
        return false;
    }

    this.getA = function(nodes) {
        for (var i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeType == 1) {
                if (nodes[i].tagName.toLowerCase() == "a") {
                    return nodes[i];
                }
                return false;
            }
        }
    }

    this.click = function(id) {
        e1 = document.getElementById(id + "-section");
        e2 = document.getElementById(id);
        if (e1.style.display == "none") {
            e1.style.display = "";
            e2.className = "section-open";	
			setCookie(id+"-section", "", 1)
			setCookie(id, "section-open", 1)
        } else {		
            e1.style.display = "none";
            e2.className = "section";
			setCookie(id+"-section", "none", 1)
			setCookie(id, "section", 1)			
        }
    }

    var self = this;
    this.id = id;
    this.tree = new Array();
    this.init();
}


// imposta il cookie sNome = sValore
// per la durata di iGiorni
function setCookie(sNome, sValore, iGiorni) {
  var dtOggi = new Date()
  var dtExpires = new Date()
  dtExpires.setTime
    (dtOggi.getTime() + 24 * iGiorni * 3600000)			
	//alert(sNome + "=" + escape(sValore) + "; expires=" + dtExpires.toGMTString()); + "; path=/;"
	document.cookie = sNome + "=" + escape(sValore) + "; expires=" + dtExpires.toGMTString(); + "; path=/;"  
}

// restituisce il valore del cookie sNome
function getCookie(sNome) {
  // genera un array di coppie "Nome = Valore"
  // NOTA: i cookies sono separati da ';'
  var asCookies = document.cookie.split("; ");
  // ciclo su tutti i cookies
  for (var iCnt = 0; iCnt < asCookies.length; iCnt++)
  {
    // leggo singolo cookie "Nome = Valore"
    var asCookie = asCookies[iCnt].split("=");
    if (sNome == asCookie[0]) { 
      //return (unescape(asCookie[1]));
	  return (escape(asCookie[1]));
    }
  }

  // SE non esiste il cookie richiesto
  return("");
}

// rimuove un cookie
function delCookie(sNome) {
  setCookie(sNome, "");
}