<!--

/*

 * DO NOT REMOVE THIS NOTICE

 *

 * PROJECT:   mygosuMenu

 * VERSION:   1.2.0b

 * COPYRIGHT: (c) 2003,2004 Cezary Tomczak

 * LINK:    http://gosu.pl/dhtml/mygosumenu.html

 * LICENSE:   BSD (revised)

 *

 * MODIFIED:  2007,2008 Cameron Clark

 * CHANGES:   1) Close all other nodes when a new node is clicked

 *            2) Remembers current open node with a cookie

 *            3) Immediately assigns class of "on" to clicked menu item, removing from all other items

 *            4) Uses blur() to remove dotted outline from clicked links

 *            5) Allows option to make parent links either just show submenus, or also open corresponding pages

 */


function TreeMenu(id, openParentPages) {


  this.init = function() {

    if (!document.getElementById(this.id)) {

      return;

      }

    document.getElementById(this.id).className = "tree-menu";  // change class name to invoke tree menu styles

    this.parse(document.getElementById(this.id).childNodes, this.tree, this.id, 0);

    this.load();

    addDOMEvent(window,'unload',function(e) { self.save(); },false);

    }


  this.parse = function(nodes, tree, id, depth) {

    var a, lastLi;

    for (var i = 0; i < nodes.length; i++) {

      if (nodes[i].nodeType != 1) {

        continue;

        }

      if (nodes[i].tagName.toLowerCase() == "li") {

        lastLi = nodes[i];

        nodes[i].id = id + "-" + tree.length;

        tree[tree.length] = new Array();

        if (a = this.getA(nodes[i].childNodes)) {

          a.id = nodes[i].id + "-a";

          if (hasClassName(a,"on")) {

            this.id_activenode = nodes[i].id;

            }

          }

        if (nodes[i].childNodes && this.hasUl(nodes[i].childNodes)) {

          nodes[i].className = (depth == 0) ? "top-section" : "section";

          if (a) {

            if (depth == 0) {

              if (this.openParentPages) // enable links on parent items (links to parent category pages work)

                eval("document.getElementById('"+a.id+"').onclick = function() {this.blur(); self.setActive(this); return self.click('"+nodes[i].id+"');}");

              else                     // disable links on parent items (so clicking them just opens submenus, not the page)

                eval("document.getElementById('"+a.id+"').onclick = function() {this.blur(); self.click('"+nodes[i].id+"'); return false;}");

              }

            else

              eval("document.getElementById('"+a.id+"').onclick = function() {this.blur(); self.setActive(this); return self.click('"+nodes[i].id+"');}");

            }

          }

        else {

          nodes[i].className = (depth == 0) ? "top-item" : "item";

          if (a) {

            if (depth == 0) {

              a.id = nodes[i].id + "-a";

              eval("document.getElementById('"+a.id+"').onclick = function() {this.blur(); self.closeAll('"+nodes[i].id+"'); self.setActive(this); return true;}");

              }

            else {

              eval("document.getElementById('"+a.id+"').onclick = function() {this.blur(); self.setActive(this); return true;}");

              }

            }

          }

        }

      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, depth+1); // run recursively through menu tree

        }

      }

    if (lastLi) {

      lastLi.className = lastLi.className + "-end";

      }

    }


  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.setActive = function(a) {

    var links = document.getElementById(this.id).getElementsByTagName("A");

    for (var i = 0; i < links.length; i++) {

      links[i].className = '';

      }

    a.className = "on";

    }

  
  this.click = function(id) {

    childList = document.getElementById(id + "-section");

    if (childList) {

      if (childList.style.display == "none") {

        this.show(id);

        this.hideOthers(document.getElementById(this.id).childNodes,id); // pass top-level menu object to start recursion

        this.id_opennode = id;                                           // set current node for saving in cookie

        return true;

        }

      else {

        this.hide(id);

        this.id_opennode = (id.split("-").length > 2) ? id.substr(0,id.lastIndexOf("-")) : ""; // set parent node, or if at top level, set to no id, for saving in cookie

        return false;

        }

      }

    }


  this.show = function(id) {

    childList  = document.getElementById(id + "-section");

    parentItem = document.getElementById(id);

    if (childList) {

      childList.style.display = "";

      parentItem.className = parentItem.className.replace(/section(-open)?/, "section-open");

      }

    }


  this.hide = function(id) {

    childList  = document.getElementById(id + "-section");

    parentItem = document.getElementById(id);

    if (childList) {

      childList.style.display = "none";

      parentItem.className = parentItem.className.replace(/section(-open)?/, "section");

      }

    }


  // runs through child nodes recursively to hide all but current node and its parents

  this.hideOthers = function(nodes,id) {

    for (var i = 0; i < nodes.length; i++) {

      if (nodes[i].nodeType == 1 && nodes[i].tagName.toLowerCase() == "li") { // find all child <li> elements

        childList = document.getElementById(nodes[i].id + "-section");

        if (childList) {

          if (id.indexOf(nodes[i].id) == -1) {  // if this is not the current node or one of its parents, hide it

            this.hide(nodes[i].id);

            }

          if (id != nodes[i].id && childList.childNodes) {  // if this is not the current node and it has child nodes, run this function recursively to hide them

            this.hideOthers(childList.childNodes,id);

            }

          }

        }

      }

    }


  this.closeAll = function(id) {

    this.hideOthers(document.getElementById(this.id).childNodes,'');

    this.id_opennode = '';

    }


  this.showParents = function(id) { // Note that this will work backwards from closest to farthest ancestor nodes

    var idPieces = id.split("-");

    var depth = idPieces.length-2;

    for (var p = 0; p < depth; p++) {

      idPieces.pop();

      this.show(idPieces.join("-"))

      }

    }


  this.save = function() {

    if (this.id_opennode) {

      this.cookie.set(this.id, this.id_opennode);

      }

    else {

      this.cookie.del(this.id);

      }

    }


  this.load = function() {

    var id_savednode = this.cookie.get(this.id);

    if (this.id_activenode) {

      this.id_opennode = this.id_activenode;

      }

    else if (id_savednode) {

      this.id_opennode = id_savednode;

      }

    if (this.id_opennode) {

      this.showParents(this.id_opennode);

      this.show(this.id_opennode);

      }

    }


  function Cookie() {

    this.get = function(name) {

      var cookies = document.cookie.split(";");

      for (var i = 0; i < cookies.length; i++) {

        var a = cookies[i].split("=");

        if (a.length == 2) {

          a[0] = a[0].trim();

          a[1] = a[1].trim();

          if (a[0] == name) {

            return unescape(a[1]);

            }

          }

        }

      return "";

      }

    this.set = function(name, value) {

      var date = new Date();

      date.setTime(date.getTime()+(24*60*60*1000)); // save for 1 day

      document.cookie = name + "=" + escape(value) + "; expires=" + date.toGMTString() + "; path=/";

      }

    this.del = function(name) {

      document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:01 GMT; path=/";

      }

    }


  var self = this;

  this.id = id;

  this.openParentPages = openParentPages;

  this.tree = new Array();

  this.cookie = new Cookie();

  this.init();

  }


// Define trim function

if (typeof String.prototype.trim == "undefined") {

  String.prototype.trim = function() {

    var s = this.replace(/^\s*/, "");

    return s.replace(/\s*$/, "");

    }

  }


// Load menu immediately

new TreeMenu('siteMenu',1);


// Iterates through all class names for an object and returns true if specified class name is found

function hasClassName(obj, className) {

  if (obj && obj.className) {

    var objClass = obj.className.trim();

    arrClasses = objClass.split(" ");

    for (var c=0; c<arrClasses.length; c++) {

      if (className == arrClasses[c])

        return true;

      }

    }

  return false;

  }


// For adding new events to any object (like preloads in tpl_categories_css.php)

function addDOMEvent(elm, evType, fn, useCapture) {

  if (elm.addEventListener) {

    elm.addEventListener(evType, fn, useCapture);

    return true;

    }

  else if (elm.attachEvent) {

    var r = elm.attachEvent('on' + evType, fn);

    return r;

    }

  else {

    elm['on' + evType] = fn;

    }

  }


// Accept any number of image sources for preloadings (separate with commas)

function preloadImages() {

  if (document.images) {

    if (!document.preloads)

      document.preloads = new Array();

    var i, j, p = document.preloads.length, a = preloadImages.arguments;

    // Check to see if the preload already exists in the array, and if so, exit function

    for (i=0; i<p; i++) {

      for (j=0; j<a.length; j++) {

        if (document.preloads[i].src == a[j])

          return;

        }

      }

    // Add preload to array

    for (j=0; j<a.length; j++) {

      document.preloads[p]       = new Image;

      document.preloads[p++].src = a[j];

      }

    }

  }

// -->