/************************************************************************************************************
(C) www.dhtmlgoodies.com, October 2005

Update log:
December, 19th, 2005 - Version 1.1: Added support for several trees on a page
January,  25th, 2006 - Version 1.2: Added onclick event to text nodes.
February, 3rd 2006 - Dynamic load nodes by use of Ajax


This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.	

Terms of use:
You are free to use this script as long as the copyright message is kept intact. However, you may not
redistribute, sell or repost it without our permission.

Thank you!

www.dhtmlgoodies.com
Alf Magne Kalleland

************************************************************************************************************/


var idOfFolderTrees = ['sitemap_tree'];
var imageFolder = '/Templates/images09/sustreport/';	// Path to images
var folderImage = '';
var plusImage = 'white-right-arrow.gif';
var minusImage = 'white-down-arrow.gif';
var initExpandedNodes = '';	// Cookie - initially expanded nodes;
var useAjaxToLoadNodesDynamically = false;
var ajaxRequestFile = '';

var ajaxObjectArray = new Array();
var treeUlCounter = 0;
var nodeId = 1;

/*
These cookie functions are downloaded from 
http://www.mach5.com/support/analyzer/manual/html/General/CookiesJavaScript.htm
*/
function Get_Cookie(name) { 
   var start = document.cookie.indexOf(name+"="); 
   var len = start+name.length+1; 
   if ((!start) && (name != document.cookie.substring(0,name.length))) return null; 
   if (start == -1) return null; 
   var end = document.cookie.indexOf(";",len); 
   if (end == -1) end = document.cookie.length; 
   return unescape(document.cookie.substring(len,end)); 
} 
// This function has been slightly modified
function Set_Cookie(name,value,expires,path,domain,secure) { 
	expires = expires * 60*60*24*1000;
	var today = new Date();
	var expires_date = new Date( today.getTime() + (expires) );
    var cookieString = name + "=" +escape(value) + 
       ( (expires) ? ";expires=" + expires_date.toGMTString() : "") + 
       ( (path) ? ";path=" + path : "") + 
       ( (domain) ? ";domain=" + domain : "") + 
       ( (secure) ? ";secure" : ""); 
    document.cookie = cookieString; 
} 

function expandAll(treeId)
{
	var menuItems = document.getElementById(treeId).getElementsByTagName('LI');
	for(var no=0;no<menuItems.length;no++){
		var subItems = menuItems[no].getElementsByTagName('UL');
		if(subItems.length>0 && subItems[0].style.display!='block'){
			showHideNode(false,menuItems[no].id.replace(/[^0-9]/g,''));
		}			
	}
}

function collapseAll(treeId)
{
	var menuItems = document.getElementById(treeId).getElementsByTagName('LI');
	for(var no=0;no<menuItems.length;no++){
		var subItems = menuItems[no].getElementsByTagName('UL');
		if(subItems.length>0 && subItems[0].style.display=='block'){
			showHideNode(false,menuItems[no].id.replace(/[^0-9]/g,''));
		}			
	}		
}

function getNodeDataFromServer(ajaxIndex,ulId,parentId)
{
	document.getElementById(ulId).innerHTML = ajaxObjectArray[ajaxIndex].response;
	ajaxObjectArray[ajaxIndex] = false;
	parseSubItems(ulId,parentId);
}


function parseSubItems(ulId,parentId)
{

	if(initExpandedNodes){
		var nodes = initExpandedNodes.split(',');
	}

	var branchObj = document.getElementById(ulId);
	var menuItems = branchObj.getElementsByTagName('LI');	// Get an array of all menu items
	for(var no=0;no<menuItems.length;no++){
		nodeId++;
		var subItems = menuItems[no].getElementsByTagName('UL');
		var img = document.createElement('IMG');
		img.src = imageFolder + plusImage;
		img.height = "11";  //was 11,11
		img.width = "11";
		img.onclick = showHideNode;
		if(subItems.length==0)img.style.visibility='hidden';else{
			subItems[0].id = 'tree_ul_' + treeUlCounter;
			treeUlCounter++;
		}
		var aTag = menuItems[no].getElementsByTagName('A')[0];
		//aTag.onclick = showHideNode;
		menuItems[no].insertBefore(img,aTag);
		menuItems[no].id = 'treeNode' + nodeId;
		/*
		var folderImg = document.createElement('IMG');
		if(menuItems[no].className){
			folderImg.src = imageFolder + menuItems[no].className;
		}else{
			folderImg.src = imageFolder + folderImage;
		}
		menuItems[no].insertBefore(folderImg,aTag);
		*/
		var tmpParentId = menuItems[no].getAttribute('parentId');
		if(!tmpParentId)tmpParentId = menuItems[no].tmpParentId;
		if(tmpParentId && nodes[tmpParentId])showHideNode(false,nodes[no]);	
	}		
}


function showHideNode(e,inputId)
{
	if(inputId){
		if(!document.getElementById('treeNode'+inputId))return;
		thisNode = document.getElementById('treeNode'+inputId).getElementsByTagName('IMG')[0]; 
	}else {
		thisNode = this;
		if(this.tagName=='A')thisNode = this.parentNode.getElementsByTagName('IMG')[0];	

	}
	if(thisNode.style.visibility=='hidden')return;
	var parentNode = thisNode.parentNode;
	inputId = parentNode.id.replace(/[^0-9]/g,'');
	if(thisNode.src.indexOf(plusImage)>=0){
		thisNode.src = thisNode.src.replace(plusImage,minusImage);
		var ul = parentNode.getElementsByTagName('UL')[0];
		ul.style.display='block';
		if(!initExpandedNodes)initExpandedNodes = ',';
		if(initExpandedNodes.indexOf(',' + inputId + ',')<0) initExpandedNodes = initExpandedNodes + inputId + ',';

		/*
		if(useAjaxToLoadNodesDynamically){	// Using AJAX/XMLHTTP to get data from the server
			var firstLi = ul.getElementsByTagName('LI')[0];
			var parentId = firstLi.getAttribute('parentId');
			if(!parentId)parentId = firstLi.parentId;
			if(parentId){
				ajaxObjectArray[ajaxObjectArray.length] = new sack();
				var ajaxIndex = ajaxObjectArray.length-1;
				ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?parentId=' + parentId;					
				ajaxObjectArray[ajaxIndex].onCompletion = function() { getNodeDataFromServer(ajaxIndex,ul.id,parentId); };	// Specify function that will be executed after file has been found					
				ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
			}			
		}
		*/

	}else{
		thisNode.src = thisNode.src.replace(minusImage,plusImage);
		parentNode.getElementsByTagName('UL')[0].style.display='none';
		initExpandedNodes = initExpandedNodes.replace(',' + inputId,'');
	}	
	Set_Cookie('report_nav_expandedNodes',initExpandedNodes,500);

	return false;
}



function initTree()
{
   	for(var treeCounter=0;treeCounter<idOfFolderTrees.length;treeCounter++)
   	{
		var dhtmlgoodies_tree = document.getElementById(idOfFolderTrees[treeCounter]);
		/* Child elements are initially displayed. Hide them if JavaScript is turned on */
		var ul = dhtmlgoodies_tree.getElementsByTagName('UL')[0];
		ul.style.display = 'none';
		var menuItems = dhtmlgoodies_tree.getElementsByTagName('LI');	// Get an array of all menu items
		
		for(var no=0;no<menuItems.length;no++)
		{
			nodeId++;
			var subItems = menuItems[no].getElementsByTagName('UL');
			var img = document.createElement('IMG');
			img.src = imageFolder + plusImage;
			img.height = "7";  //was 7,7
			img.width = "7";
			img.onclick = showHideNode;
			if(subItems.length==0)
				img.style.visibility='hidden';
			else
			{
				subItems[0].id = 'tree_ul_' + treeUlCounter;
				treeUlCounter++;
				/* 	Added to fix logical error in display of proper image.
					This was introduced when the tree degraded gracefully when JavaScript was switched off.
				*/
				subItems[0].style.display = 'none';
			}
			var aTag = menuItems[no].getElementsByTagName('A')[0];
			//aTag.onclick = showHideNode;
			menuItems[no].insertBefore(img, aTag);
			menuItems[no].id = 'treeNode' + nodeId;
			/*
			var folderImg = document.createElement('IMG');
			if(menuItems[no].className)
			{
				folderImg.src = imageFolder + menuItems[no].className;
			}
			else
			{
				folderImg.src = imageFolder + folderImage;
			}
			menuItems[no].insertBefore(folderImg,aTag);
			*/
		}	

	}
	initExpandedNodes = Get_Cookie('report_nav_expandedNodes');
	if(initExpandedNodes){
	   
		var nodes = initExpandedNodes.split(',');
		for(var no=0;no<nodes.length;no++){
			if(nodes[no])showHideNode(false,nodes[no]);	
		}
		// if no nodes are expanded, expand the first node
		if (nodes.length == 2) {
			showHideNode(false, 2);
		}
	}
	// if no cookie has been set, expand the first node to indicate to users how to use the modified tree
	else {
		showHideNode(false, 2);
	}
}

window.onload = initTree;