// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
// Modified by: Gustavo Gil --> only one list can be expanded
// ===================================================================
addEvent(window,"load",convertTrees);
function addEvent(o,e,f){if(o.addEventListener){o.addEventListener(e,f,true);return true;}else if(o.attachEvent){return o.attachEvent("on"+e,f);}else{return false;}}
function setDefault(name,val){if(typeof(window[name])=="undefined" || window[name]==null){window[name]=val;}}
function expandTree(treeId){var ul = document.getElementById(treeId);if(ul == null){return false;}expandCollapseList(ul,nodeOpenClass);}
function collapseTree(treeId){var ul = document.getElementById(treeId);if(ul == null){return false;}expandCollapseList(ul,nodeClosedClass);}
function expandToItem(treeId,itemId){var ul = document.getElementById(treeId);if(ul == null){return false;}var ret = expandCollapseList(ul,nodeOpenClass,itemId);if(ret){var o = document.getElementById(itemId);if(o!=null && o.scrollIntoView){o.scrollIntoView(false);}}}
function expandCollapseList(ul,cName,itemId){if(!ul.childNodes || ul.childNodes.length==0){return false;}for(var itemi=0;itemi<ul.childNodes.length;itemi++){var item = ul.childNodes[itemi];if(itemId!=null && item.id==itemId){return true;}if(item.nodeName == "LI"){var subLists = false;for(var sitemi=0;sitemi<item.childNodes.length;sitemi++){var sitem = item.childNodes[sitemi];if(sitem.nodeName=="UL"){subLists = true;var ret = expandCollapseList(sitem,cName,itemId);if(itemId!=null && ret){item.className=cName;return true;}}}if(subLists && itemId==null){item.className = cName;}}}}
function convertTrees(){setDefault("treeClass","mktree");setDefault("nodeClosedClass","liClosed");setDefault("nodeOpenClass","liOpen");setDefault("nodeBulletClass","liBullet");setDefault("nodeLinkClass","bullet");setDefault("preProcessTrees",true);if(preProcessTrees){if(!document.createElement){return;}uls = document.getElementsByTagName("ul");for(var uli=0;uli<uls.length;uli++){var ul=uls[uli];if(ul.nodeName=="UL" && ul.className==treeClass){processList(ul);}}}}
function processList(ul){if(!ul.childNodes || ul.childNodes.length==0){return;}for(var itemi=0;itemi<ul.childNodes.length;itemi++){var item = ul.childNodes[itemi];if(item.nodeName == "LI"){var subLists = false;for(var sitemi=0;sitemi<item.childNodes.length;sitemi++){var sitem = item.childNodes[sitemi];if(sitem.nodeName=="UL"){subLists = true;processList(sitem);}}var s= document.createElement("SPAN");var t= '\u00A0';s.className = nodeLinkClass;if(subLists){if(item.className==null || item.className==""){item.className = nodeClosedClass;}if(item.firstChild.nodeName=="#text"){t = t+item.firstChild.nodeValue;item.removeChild(item.firstChild);}s.onclick = function(){if (this.parentNode.className==nodeOpenClass) { this.parentNode.className = nodeClosedClass } else { collapseTree('menu_tree'); this.parentNode.className = nodeOpenClass;}return false;}}else{item.className = nodeBulletClass;s.onclick = function(){return false;}}s.appendChild(document.createTextNode(t));item.insertBefore(s,item.firstChild);}}}