/************************************************************************************************************
	(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 = ['dhtmlgoodies_tree','dhtmlgoodies_tree2'];
	
	var imageFolder = 'img/';	// Path to images
	var folderImage = 'dhtmlgoodies_folder.gif';
	var plusImage = 'dhtmlgoodies_plus.gif';
	var minusImage = 'dhtmlgoodies_minus.gif';
	var initExpandedNodes = '';	// Cookie - initially expanded nodes;
	var useAjaxToLoadNodesDynamically = true;
	var ajaxRequestFile = 'writeNodes.php';
	var contextMenuActive = false;	// Set to false if you don't want to be able to delete and add new nodes dynamically
	
	var ajaxObjectArray = new Array();
	var ajaxObjectArray2 = new Array();
	
	var ajaxObjectArray3 = new Array();
	var ajaxObjectArray4 = new Array();
		var ajaxObjectArray5 = 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 expandOne(treeId)
	{
		var menuItems = document.getElementById(treeId).getElementsByTagName('LI');
		for(var no=0;no<menuItems.length;no++){
			
				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 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++){
			var imgs = menuItems[no].getElementsByTagName('IMG');
			if(imgs.length>0)continue;
			nodeId++;
			var subItems = menuItems[no].getElementsByTagName('UL');
			var img = document.createElement('IMG');
			img.src = imageFolder + plusImage;
			img.onclick = showHideNode2;
			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;
			if(contextMenuActive)aTag.oncontextmenu = showContextMenu;

							
			menuItems[no].insertBefore(img,aTag);
			menuItems[no].id = 'dhtmlgoodies_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])showHideNode2(false,nodes[no]);	
		}		
	}
		function showUpdate(ajaxIndex)
	{
		document.getElementById('contentarea2').innerHTML = ajaxObjectArray2[ajaxIndex].response;
		ajaxObjectArray2[ajaxIndex] = false;
		
	}
		function getNodeDataFromServer(ajaxIndex,ulId,parentId)
	{
		document.getElementById(ulId).innerHTML = ajaxObjectArray[ajaxIndex].response;
		
		ajaxObjectArray[ajaxIndex] = false;
		parseSubItems(ulId,parentId);
	}
	
		function showUpdate2(ajaxIndex)
	{
		document.getElementById('contentarea2').innerHTML = ajaxObjectArray4[ajaxIndex].response;
		ajaxObjectArray4[ajaxIndex] = false;
		
	}
		function getNodeDataFromServer2(ajaxIndex,ulId,parentId)
	{
		document.getElementById(ulId).innerHTML = ajaxObjectArray3[ajaxIndex].response;
		
		ajaxObjectArray3[ajaxIndex] = false;
		parseSubItems(ulId,parentId);
	}
	
	
	
	
	function showHideNode(e,inputId)
	{
		
		
		if(inputId){
			if(!document.getElementById('dhtmlgoodies_treeNode'+inputId))return;
			thisNode = document.getElementById('dhtmlgoodies_treeNode'+inputId).getElementsByTagName('IMG')[0]; 
		}else {
			thisNode = this;
			if(this.tagName=='A')thisNode = this.parentNode.getElementsByTagName('IMG')[0];	
			
		}
		
		
		if(thisNode.style.visibility=='hidden')
		{
			
		var parentId=this.getAttribute('parentId');
			ajaxObjectArray[ajaxObjectArray.length] = new sack();
					var ajaxIndex = ajaxObjectArray5.length-1;
					ajaxObjectArray2[ajaxObjectArray2.length] = new sack();
					var ajaxIndex = ajaxObjectArray2.length-1;
					ajaxObjectArray2[ajaxIndex].requestFile = ajaxRequestFile + '?parentId7=' + parentId;	
						
					ajaxObjectArray2[ajaxIndex].onCompletion = function() { showUpdate(ajaxIndex); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray2[ajaxIndex].runAJAX();		// Execute AJAX function
					
					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 + '?parentId8=' + 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
					
					ajaxObjectArray2[ajaxObjectArray2.length] = new sack();
					var ajaxIndex = ajaxObjectArray2.length-1;
					ajaxObjectArray2[ajaxIndex].requestFile = ajaxRequestFile + '?parentId7=' + parentId;	
						
					ajaxObjectArray2[ajaxIndex].onCompletion = function() { showUpdate(ajaxIndex); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray2[ajaxIndex].runAJAX();		// Execute AJAX function
					
					
		
				}	
			
				
				
			}
			
		}
		else{
			
				var parentNode = thisNode.parentNode;
				var ul = parentNode.getElementsByTagName('UL')[0];
				//for( var t = 0; t <firstLi.length; t++ ) {
			//window.alert(firstLi.getAttribute[t].nodeValue);
	//}
	
				var firstLi = ul.getElementsByTagName('LI')[0];
				
				var parentId = firstLi.getAttribute('parentId');
				
			
				if(!parentId)parentId = firstLi.parentId;
				
		
		
					
		ajaxObjectArray4[ajaxObjectArray4.length] = new sack();
					var ajaxIndex = ajaxObjectArray4.length-1;
					ajaxObjectArray4[ajaxIndex].requestFile = ajaxRequestFile + '?parentId7=' + parentId;	
						
					ajaxObjectArray4[ajaxIndex].onCompletion = function() { showUpdate2(ajaxIndex); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray4[ajaxIndex].runAJAX();		// Execute AJAX function
			
			
			/*thisNode.src = thisNode.src.replace(minusImage,plusImage);
			parentNode.getElementsByTagName('UL')[0].style.display='none';
			initExpandedNodes = initExpandedNodes.replace(',' + inputId,'');*/
			
		}	
		Set_Cookie('dhtmlgoodies_expandedNodes',initExpandedNodes,500);
		
		return false;
	}
	
	function showHideNode2(e,inputId)
	{
		if(inputId){
			if(!document.getElementById('dhtmlgoodies_treeNode'+inputId))return;
			thisNode = document.getElementById('dhtmlgoodies_treeNode'+inputId).getElementsByTagName('IMG')[0]; 
		}else {
			thisNode = this;
			if(this.tagName=='A')thisNode = this.parentNode.getElementsByTagName('IMG')[0];	
					}
						if(thisNode.style.visibility=='hidden')
		{
			
		var parentId=this.getAttribute('parentId');
			ajaxObjectArray[ajaxObjectArray.length] = new sack();
					var ajaxIndex = ajaxObjectArray5.length-1;
					ajaxObjectArray2[ajaxObjectArray2.length] = new sack();
					var ajaxIndex = ajaxObjectArray2.length-1;
					ajaxObjectArray2[ajaxIndex].requestFile = ajaxRequestFile + '?parentId7=' + parentId;	
						
					ajaxObjectArray2[ajaxIndex].onCompletion = function() { showUpdate(ajaxIndex); };	// Specify function that will be executed after file has been found					
					ajaxObjectArray2[ajaxIndex].runAJAX();		// Execute AJAX function
					
					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 + '?parentId8=' + 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('dhtmlgoodies_expandedNodes',initExpandedNodes,500);
		
		return false;
	}
	
	
	
	
	
	
	
	
	
	
	var okToCreateSubNode = true;
	function addNewNode(e)
	{
		if(!okToCreateSubNode)return;
		setTimeout('okToCreateSubNode=true',200);
		contextMenuObj.style.display='none';
		okToCreateSubNode = false;
		source = contextMenuSource;
		while(source.tagName.toLowerCase()!='li')source = source.parentNode;
		
	
		/*
		if (e.target) source = e.target;
			else if (e.srcElement) source = e.srcElement;
			if (source.nodeType == 3) // defeat Safari bug
				source = source.parentNode; */
		//while(source.tagName.toLowerCase()!='li')source = source.parentNode;
		var nameOfNewNode = prompt('Name of new node');
		if(!nameOfNewNode)return;

		uls = source.getElementsByTagName('UL');
		if(uls.length==0){
			var ul = document.createElement('UL');
			source.appendChild(ul);
			
		}else{
			ul = uls[0];
			ul.style.display='block';
		}
		var img = source.getElementsByTagName('IMG');
		img[0].style.visibility='visible';
		var li = document.createElement('LI');
		li.className='dhtmlgoodies_sheet.gif';
		var a = document.createElement('A');
		a.href = '#';
		a.innerHTML = nameOfNewNode;
		li.appendChild(a);
		ul.id = 'newNode' + Math.round(Math.random()*1000000);
		ul.appendChild(li);
		parseSubItems(ul.id);
		saveNewNode(nameOfNewNode,source.getElementsByTagName('A')[0].id);
		
	}
	
	/* Save a new node */
	function saveNewNode(nodeText,parentId)
	{
		self.status = 'Ready to save node ' + nodeText + ' which is a sub item of ' + parentId;
		// Use an ajax method here to save this new node. example below:
		/*
		ajaxObjectArray[ajaxObjectArray.length] = new sack();
		var ajaxIndex = ajaxObjectArray.length-1;
		ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?newNode=' + nodeText + '&parendId=' + parentId					
		ajaxObjectArray[ajaxIndex].onCompletion = function() { self.status = 'New node has been saved'; };	// Specify function that will be executed after file has been found					
		ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
		*/		
	}
	
	function deleteNode()
	{
		if(!okToCreateSubNode)return;		
		setTimeout('okToCreateSubNode=true',200);		
		contextMenuObj.style.display='none';
		source = contextMenuSource;
		
		if(!confirm('Click OK to delete the node ' + source.innerHTML))return;
		okToCreateSubNode = false;
		
		var parentLi = source.parentNode.parentNode.parentNode;
		while(source.tagName.toLowerCase()!='li')source = source.parentNode;		

		var lis = source.parentNode.getElementsByTagName('LI');
		source.parentNode.removeChild(source);
		if(lis.length==0)parentLi.getElementsByTagName('IMG')[0].style.visibility='hidden';
		deleteNodeOnServer(source.id);
	}
	
	function deleteNodeOnServer(nodeId)
	{
		self.status = 'Ready to delete node' + nodeId;
		// Use an ajax method here to save this new node. example below:
		/*
		ajaxObjectArray[ajaxObjectArray.length] = new sack();
		var ajaxIndex = ajaxObjectArray.length-1;
		ajaxObjectArray[ajaxIndex].requestFile = ajaxRequestFile + '?deleteNodeId=' + nodeId					
		ajaxObjectArray[ajaxIndex].onCompletion = function() { self.status = 'Node has been deleted successfully'; };	// Specify function that will be executed after file has been found					
		ajaxObjectArray[ajaxIndex].runAJAX();		// Execute AJAX function
		*/				
		
	}
	
	function initTree()
	{
		
		for(var treeCounter=0;treeCounter<idOfFolderTrees.length;treeCounter++){
			var dhtmlgoodies_tree = document.getElementById(idOfFolderTrees[treeCounter]);
			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.onclick = showHideNode2;
				if(subItems.length==0)img.style.visibility='hidden';else{
					subItems[0].id = 'tree_ul_' + treeUlCounter;
					treeUlCounter++;
				}
				var aTag = menuItems[no].getElementsByTagName('A')[0];
				if(contextMenuActive)aTag.oncontextmenu = showContextMenu;
				aTag.onclick = showHideNode;
				menuItems[no].insertBefore(img,aTag);
				if(!menuItems[no].id)menuItems[no].id = 'dhtmlgoodies_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('dhtmlgoodies_expandedNodes');
		if(initExpandedNodes){
			var nodes = initExpandedNodes.split(',');
			for(var no=0;no<nodes.length;no++){
				if(nodes[no])showHideNode2(false,nodes[no]);	
			}			
		}	
	}
	
	window.onload = initTree;