function TreeMenu(iconpath, myname, linkTarget, defaultClass, usePersistence, noTopLevelImages)
{
 this.iconpath         = iconpath;
 this.myname           = myname;
 this.linkTarget       = linkTarget;
 this.defaultClass     = defaultClass;
 this.usePersistence   = usePersistence;
 this.noTopLevelImages = noTopLevelImages;
 this.n                = new Array();
 this.nodeRefs       = new Array();
 this.branches       = new Array();
 this.branchStatus   = new Array();
 this.layerRelations = new Array();
 this.childParents   = new Array();
 this.cookieStatuses = new Array();
 this.preloadImages();
}
TreeMenu.prototype.addItem = function (newNode)
{
 newIndex = this.n.length;
 this.n[newIndex] = newNode;
 return this.n[newIndex];
}
TreeMenu.prototype.preloadImages = function ()
{
 var plustop = new Image; plustop.src = this.iconpath + '/plustop.gif';
 var plusbottom = new Image; plusbottom.src = this.iconpath + '/plusbottom.gif';
 var plus = new Image; plus.src = this.iconpath + '/plus.gif';
 var minustop = new Image; minustop.src = this.iconpath + '/minustop.gif';
 var minusbottom = new Image; minusbottom.src = this.iconpath + '/minusbottom.gif';
 var minus = new Image; minus.src = this.iconpath + '/minus.gif';
 var branchtop = new Image; branchtop.src = this.iconpath + '/branchtop.gif';
 var branchbottom = new Image; branchbottom.src = this.iconpath + '/branchbottom.gif';
 var branch = new Image; branch.src = this.iconpath + '/branch.gif';
 var linebottom = new Image; linebottom.src = this.iconpath + '/linebottom.gif';
 var line = new Image; line.src = this.iconpath + '/line.gif';
}
TreeMenu.prototype.drawMenu = function ()
{
 var output        = '';
 var modifier      = '';
 var layerID       = '';
 var parentLayerID = '';
 var nodes         = arguments[0] ? arguments[0] : this.n
 var level         = arguments[1] ? arguments[1] : [];
 var prepend       = arguments[2] ? arguments[2] : '';
 var expanded      = arguments[3] ? arguments[3] : false;
 var visibility    = arguments[4] ? arguments[4] : 'inline';
 var parentLayerID = arguments[5] ? arguments[5] : null;
 var currentlevel  = level.length;
 for (var i=0; i<nodes.length; i++) {
  level[currentlevel] = i+1;
  layerID = this.myname + '_' + 'node_' + this.implode('_', level);
  this.nodeRefs[layerID] = nodes[i];
  this.childParents[layerID] = parentLayerID;
  if (i == 0 && parentLayerID == null) {
   modifier = nodes.length > 1 ? "top" : 'single';
  } else if(i == (nodes.length-1)) {
   modifier = "bottom";
  } else {
   modifier = "";
  }
  if (!this.doesMenu() || (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages))) {
   expanded = true;
  } else if (nodes[i].expanded) {
   expanded = true;
  } else {
   expanded = false;
  }
  visibility =  this.checkParentVisibility(layerID) ? visibility : 'none';
  if (nodes[i].n.length > 0) {
   this.branchStatus[layerID] = expanded;
   this.branches[this.branches.length] = layerID;
  }
  if (!this.layerRelations[parentLayerID]) {
   this.layerRelations[parentLayerID] = new Array();
  }
  this.layerRelations[parentLayerID][this.layerRelations[parentLayerID].length] = layerID;
  var gifname = nodes[i].n.length && this.doesMenu() && nodes[i].isDynamic ? (expanded ? 'minus' : 'plus') : 'branch';
  var iconimg = nodes[i].icon ? this.stringFormat('<img src="{0}/{1}" width="20" height="20" align="top" id="icon_{2}">', this.iconpath, nodes[i].icon, layerID) : '';
  var eventHandlers = "";
  for (j in nodes[i].events) {
   eventHandlers += this.stringFormat('{0}="{1}" ', j, nodes[i].events[j]);
  }
  var layerTag  = this.doesMenu() ? this.stringFormat('<div id="{0}" style="display: {1}" class="{2}">', layerID, visibility, (nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass)) : this.stringFormat('<div class="{0}">', nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass);
  var onMDown   = this.doesMenu() && nodes[i].n.length  && nodes[i].isDynamic ? this.stringFormat('onmousedown="{0}.toggleBranch(\'{1}\', true)" style="cursor: pointer; cursor: hand"', this.myname, layerID) : '';
  var imgTag    = this.stringFormat('<img src="{0}/{1}{2}.gif" width="20" height="20" align="top" border="0" name="img_{3}" {4}>', this.iconpath, gifname, modifier, layerID, onMDown);
  var linkTarget= nodes[i].linkTarget ? nodes[i].linkTarget : this.linkTarget;
  var linkStart = nodes[i].link ? this.stringFormat('<a href="{0}" target="{1}">', nodes[i].link, linkTarget) : '';
  var linkEnd   = nodes[i].link ? '</a>' : '';
  output = this.stringFormat('{0}<nobr>{1}{2}{3}{4}<span {5}>{6}</span>{7}</nobr><br></div>',
   layerTag,
   prepend,
   parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages) ? '' : imgTag,
    iconimg,
    linkStart,
    eventHandlers,
    nodes[i].title,
    linkEnd);
  document.write(output + "\r\n");
  if (nodes[i].n.length) {
   if (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages)) {
    var newPrepend = '';
   } else if (i < (nodes.length - 1)) {
    var newPrepend = prepend + this.stringFormat('<img src="{0}/line.gif" width="20" height="20" align="top">', this.iconpath);
   } else {
    var newPrepend = prepend + this.stringFormat('<img src="{0}/linebottom.gif" width="20" height="20" align="top">', this.iconpath);
   }
   this.drawMenu(nodes[i].n,
    level,
    newPrepend,
    nodes[i].expanded,
    expanded ? 'inline' : 'none',
    layerID);
  }
 }
}
TreeMenu.prototype.toggleBranch = function (layerID, updateStatus)
{
 var currentDisplay = this.getLayer(layerID).style.display;
 var newDisplay     = (this.branchStatus[layerID] && currentDisplay == 'inline') ? 'none' : 'inline';
 var fireEvents     = arguments[2] != null ? arguments[2] : true;
 for (var i=0; i<this.layerRelations[layerID].length; i++) {
  if (this.branchStatus[this.layerRelations[layerID][i]]) {
   this.toggleBranch(this.layerRelations[layerID][i], false);
  }
  this.getLayer(this.layerRelations[layerID][i]).style.display = newDisplay;
 }

 if (updateStatus) {
  this.branchStatus[layerID] = !this.branchStatus[layerID];
  if (this.doesPersistence() && !arguments[2] && this.usePersistence) {
   this.setExpandedStatusForCookie(layerID, this.branchStatus[layerID]);
  }
  if (fireEvents) {
   nodeObject = this.nodeRefs[layerID];
   if (nodeObject.ontoggle != null) {
    eval(nodeObject.ontoggle);
   }
   if (newDisplay == 'none' && nodeObject.oncollapse != null) {
    eval(nodeObject.oncollapse);
   } else if (newDisplay == 'inline' && nodeObject.onexpand != null){
    eval(nodeObject.onexpand);
   }
  }
  this.swapImage(layerID);
 }
 this.swapIcon(layerID);
}
TreeMenu.prototype.swapImage = function (layerID)
{
 var imgSrc = document.images['img_' + layerID].src;
 var re = /^(.*)(plus|minus)(bottom|top|single)?.gif$/
 if (matches = imgSrc.match(re)) {
  document.images['img_' + layerID].src = this.stringFormat('{0}{1}{2}{3}',
  matches[1],
  matches[2] == 'plus' ? 'minus' : 'plus',
  matches[3] ? matches[3] : '',
  '.gif');
 }
}
TreeMenu.prototype.swapIcon = function (layerID)
{
 if (document.images['icon_' + layerID]) {
  var imgSrc = document.images['icon_' + layerID].src;
  if (this.nodeRefs[layerID].icon && this.nodeRefs[layerID].expandedIcon) {
   var newSrc = (imgSrc.indexOf(this.nodeRefs[layerID].expandedIcon) == -1 ? this.nodeRefs[layerID].expandedIcon : this.nodeRefs[layerID].icon);
   document.images['icon_' + layerID].src = this.iconpath + '/' + newSrc;
  }
 }
}
TreeMenu.prototype.doesMenu = function ()
{
 return (is_ie4up || is_nav6up || is_gecko || is_opera7 || is_konqueror);
}
TreeMenu.prototype.doesPersistence = function ()
{
 return (is_ie4up || is_gecko || is_nav6up || is_opera7);
}
TreeMenu.prototype.getLayer = function (layerID)
{
 if (is_ie4) {
  return document.all(layerID);
 } else if (document.getElementById(layerID)) {
  return document.getElementById(layerID);
 } else if (document.all(layerID)) {
  return document.all(layerID);
 }
}
TreeMenu.prototype.setExpandedStatusForCookie = function (layerID, expanded)
{
 this.cookieStatuses[layerID] = expanded;
 this.saveCookie();
}
TreeMenu.prototype.getExpandedStatusFromCookie = function (layerID)
{
 if (this.cookieStatuses[layerID]) {
  return this.cookieStatuses[layerID];
 }
 return false;
}
TreeMenu.prototype.saveCookie = function ()
{
 var cookieString = new Array();
 for (var i in this.cookieStatuses) {
  if (this.cookieStatuses[i] == true) {
   cookieString[cookieString.length] = i;
  }
 }
 document.cookie = 'TreeMenuBranchStatus=' + cookieString.join(':');
}
TreeMenu.prototype.loadCookie = function ()
{
 var cookie = document.cookie.split('; ');
 for (var i=0; i < cookie.length; i++) {
  var crumb = cookie[i].split('=');
  if ('TreeMenuBranchStatus' == crumb[0] && crumb[1]) {
   var expandedBranches = crumb[1].split(':');
   for (var j=0; j<expandedBranches.length; j++) {
    this.cookieStatuses[expandedBranches[j]] = true;
   }
  }
 }
}
TreeMenu.prototype.resetBranches = function ()
{
 if (!this.doesPersistence()) {
  return false;
 }
 this.loadCookie();
 for (var i=0; i<this.branches.length; i++) {
  var status = this.getExpandedStatusFromCookie(this.branches[i]);
  if (status == true && this.branchStatus[this.branches[i]] != true) {
   if (this.checkParentVisibility(this.branches[i])) {
    this.toggleBranch(this.branches[i], true, false);
   } else {
    this.branchStatus[this.branches[i]] = true;
    this.swapImage(this.branches[i]);
   }
  }
 }
}
TreeMenu.prototype.checkParentVisibility = function (layerID)
{
 if (this.in_array(this.childParents[layerID], this.branches)
  && this.branchStatus[this.childParents[layerID]]
  && this.checkParentVisibility(this.childParents[layerID]) ) {return true;} 
 else if (this.childParents[layerID] == null){return true;}
 return false;
}
TreeMenu.prototype.stringFormat = function (strInput)
{
 var idx = 0;
 for (var i=1; i<arguments.length; i++) {
  while ((idx = strInput.indexOf('{' + (i - 1) + '}', idx)) != -1) {
   strInput = strInput.substring(0, idx) + arguments[i] + strInput.substr(idx + 3);
  }
 }
 return strInput;
}
TreeMenu.prototype.implode = function (seperator, input)
{
 var output = '';
 for (var i=0; i<input.length; i++) output +=i==0?input[i]:(seperator+input[i]);
 return output;
}
TreeMenu.prototype.in_array = function (item, arr)
{
 for (var i=0; i<arr.length; i++) if (arr[i] == item) return true;
 return false;
}
function TreeNode(title, icon, link, expanded, isDynamic, cssClass, linkTarget, expandedIcon)
{
 this.title        = title;
 this.icon         = icon;
 this.expandedIcon = expandedIcon;
 this.link         = link;
 this.expanded     = expanded;
 this.isDynamic    = isDynamic;
 this.cssClass     = cssClass;
 this.linkTarget   = linkTarget;
 this.n            = new Array();
 this.events       = new Array();
 this.handlers     = null;
 this.oncollapse   = null;
 this.onexpand     = null;
 this.ontoggle     = null;
}
TreeNode.prototype.addItem = function (newNode)
{
 newIndex = this.n.length;
 this.n[newIndex] = newNode;
 return this.n[newIndex];
}
TreeNode.prototype.setEvent = function (eventName, eventHandler)
{
 switch (eventName.toLowerCase()) {
  case 'onexpand':
   this.onexpand = eventHandler;
   break;
  case 'oncollapse':
   this.oncollapse = eventHandler;
   break;
  case 'ontoggle':
   this.ontoggle = eventHandler;
   break;
  default:
   this.events[eventName] = eventHandler;
 }
}
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
 && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
 && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko = (agt.indexOf('gecko') != -1);
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
var is_ie4up  = (is_ie && (is_major >= 4));
var is_opera  = (agt.indexOf("opera") != -1);
var is_opera7 = is_opera && (agt.indexOf("opera 7") != -1);
var is_konqueror  = (agt.indexOf("konqueror") != -1);