/* dTree 2.05 | www.destroydrop.com/javascript/tree/ Copyright (c) 2002-2003 Geir Landrö This script can be used freely as long as all copyright messages are intact. Updated: 17.04.2003*/

function Node(id, pid, name, url, title, target, icon, iconOpen, open) // Node object
	{
		this.id = id;
		this.pid = pid;
		this.name = name;
		this.url = url;
		this.title = title;
		this.target = target;
		this.icon = icon;
		this.iconOpen = iconOpen;
		this._io = open || false;
		this._is = false;
		this._ls = false;
		this._hc = false;
		this._ai = 0;
		this._p;
	};

function dTree(objName) // Tree object
	{
		this.config = 
			{
				target					: null,
				folderLinks			: true,
				useSelection		: true,
				useCookies			: true,
				useLines				: true,
				useIcons				: true,
				useStatusText		: false,
				closeSameLevel	: false,
				inOrder					: false
			}
		this.icon = 
			{
				root				: 'img/base.gif',
				folder			: 'img/folder.gif',
				folderOpen	: 'img/folderopen.gif',
				node				: 'img/page.gif',
				empty				: 'img/empty.gif',
				line				: 'img/line.gif',
				join				: 'img/join.gif',
				joinBottom	: 'img/joinbottom.gif',
				plus				: 'img/plus.gif',
				plusBottom	: 'img/plusbottom.gif',
				minus				: 'img/minus.gif',
				minusBottom	: 'img/minusbottom.gif',
				nlPlus			: 'img/nolines_plus.gif',
				nlMinus			: 'img/nolines_minus.gif'
			};
		this.obj = objName;
		this.aNodes = [];
		this.aIndent = [];
		this.root = new Node(-1);
		this.selectedNode = null;
		this.selectedFound = false;
		this.completed = false;
	};

dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open) // Adds a new node to the node array
	{	this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open);	};

dTree.prototype.openAll = function() // Open/close all nodes
	{	this.oAll(true);	};

dTree.prototype.closeAll = function() 
	{	this.oAll(false);	};

dTree.prototype.toString = function() // Outputs the tree to the page
	{
		var str = '<div class="dtree">\n';
		if (document.getElementById) 
			{
				if (this.config.useCookies) this.selectedNode = this.getSelected();
				str += this.addNode(this.root);
			} 
		else 
			{	str += 'Browser not supported.';	}
		str += '</div>';
		if (!this.selectedFound) this.selectedNode = null;
		this.completed = true;
		return str;
	};

dTree.prototype.addNode = function(pNode) // Creates the tree structure
	{
		var str = '';
		var n=0;	
		if (this.config.inOrder) n = pNode._ai;
		for (n; n<this.aNodes.length; n++) 
			{
				if (this.aNodes[n].pid == pNode.id) 
					{
						var cn = this.aNodes[n];
						cn._p = pNode;
						cn._ai = n;
						this.setCS(cn);
						if (!cn.target && this.config.target) cn.target = this.config.target;
						if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
						if (!this.config.folderLinks && cn._hc) cn.url = null;
						if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) 
							{
								cn._is = true;
								this.selectedNode = n;
								this.selectedFound = true;
							}
						str += this.node(cn, n);
						if (cn._ls) break;
					}
			}
		return str;
	};

dTree.prototype.node = function(node, nodeId) // Creates the node icon, url and text
	{
		var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
		if (this.config.useIcons) 
			{
				if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
				if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
				if (this.root.id == node.pid) 
					{
						node.icon = this.icon.root;
						node.iconOpen = this.icon.root;
					}
				str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
			}
		if (node.url) 
			{
				str += node.url; // This will allow us to add in our own html to the object, instead of a chintzy url that gets appended in an anchor.
				/*str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';
				if (node.title) str += ' title="' + node.title + '"';
				if (node.target) str += ' target="' + node.target + '"';
				if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';
				if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
					str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
				str += '>';*/
			}
		else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
		str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';
		// str += node.name;
		if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
		str += '</div>';
		if (node._hc) 
			{
				str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';
				str += this.addNode(node);
				str += '</div>';
			}
		this.aIndent.pop();
		return str;
	};

dTree.prototype.indent = function(node, nodeId) // Adds the empty and line icons
	{
		var str = '';
		if (this.root.id != node.pid) 
			{
				for (var n=0; n<this.aIndent.length; n++)
					str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';
				(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
				if (node._hc) 
					{
						str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';
						if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
						else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
						str += '" alt="" /></a>';
					} 
				else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';
			}
		return str;
	};

dTree.prototype.setCS = function(node) // Checks if a node has any children and if it is the last sibling
	{
		var lastId;
		for (var n=0; n<this.aNodes.length; n++) 
			{
				if (this.aNodes[n].pid == node.id) node._hc = true;
				if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
			}
		if (lastId==node.id) node._ls = true;
	};

dTree.prototype.getSelected = function() // Returns the selected node
	{
		var sn = this.getCookie('cs' + this.obj);
		return (sn) ? sn : null;
	};

dTree.prototype.s = function(id) // Highlights the selected node
	{
		if (!this.config.useSelection) return;
		var cn = this.aNodes[id];
		if (cn._hc && !this.config.folderLinks) return;
		if (this.selectedNode != id) 
			{
				if (this.selectedNode || this.selectedNode==0) 
					{
						eOld = document.getElementById("s" + this.obj + this.selectedNode);
						eOld.className = "node";
					}
				eNew = document.getElementById("s" + this.obj + id);
				eNew.className = "nodeSel";
				this.selectedNode = id;
				if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
			}
	};

dTree.prototype.o = function(id) // Toggle Open or close
	{
		var cn = this.aNodes[id];
		this.nodeStatus(!cn._io, id, cn._ls);
		cn._io = !cn._io;
		if (this.config.closeSameLevel) this.closeLevel(cn);
		if (this.config.useCookies) this.updateCookie();
	};

dTree.prototype.oAll = function(status) // Open or close all nodes
	{
		for (var n=0; n<this.aNodes.length; n++) 
			{
				if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) 
					{
						this.nodeStatus(status, n, this.aNodes[n]._ls)
						this.aNodes[n]._io = status;
					}
			}
		if (this.config.useCookies) this.updateCookie();
	};

dTree.prototype.openTo = function(nId, bSelect, bFirst) // Opens the tree to a specific node
	{
		if (!bFirst) 
			{
				for (var n=0; n<this.aNodes.length; n++) 
					{
						if (this.aNodes[n].id == nId) 
							{
								nId=n;
								break;
							}
					}
			}
		var cn=this.aNodes[nId];
		if (cn.pid==this.root.id || !cn._p) return;
		cn._io = true;
		cn._is = bSelect;
		if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
		if (this.completed && bSelect) this.s(cn._ai);
		else if (bSelect) this._sn=cn._ai;
		this.openTo(cn._p._ai, false, true);
	};

dTree.prototype.closeLevel = function(node) // Closes all nodes on the same level as certain node
	{
		for (var n=0; n<this.aNodes.length; n++) 
			{
				if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) 
					{
						this.nodeStatus(false, n, this.aNodes[n]._ls);
						this.aNodes[n]._io = false;
						this.closeAllChildren(this.aNodes[n]);
					}
			}
	}

dTree.prototype.closeAllChildren = function(node) // Closes all children of a node
	{
		for (var n=0; n<this.aNodes.length; n++) 
			{
				if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) 
					{
						if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
						this.aNodes[n]._io = false;
						this.closeAllChildren(this.aNodes[n]);		
					}
			}
	}

dTree.prototype.nodeStatus = function(status, id, bottom) // Change the status of a node(open or closed)
	{
		eDiv	= document.getElementById('d' + this.obj + id);
		eJoin	= document.getElementById('j' + this.obj + id);
		if (this.config.useIcons) 
			{
				eIcon	= document.getElementById('i' + this.obj + id);
				eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
			}
		eJoin.src = (this.config.useLines)?
		((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):
		((status)?this.icon.nlMinus:this.icon.nlPlus);
		eDiv.style.display = (status) ? 'block': 'none';
	};

dTree.prototype.clearCookie = function() // [Cookie] Clears a cookie
	{
		var now = new Date();
		var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
		this.setCookie('co'+this.obj, 'cookieValue', yesterday);
		this.setCookie('cs'+this.obj, 'cookieValue', yesterday);
	};


dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) // [Cookie] Sets value in a cookie
	{
		document.cookie =
			escape(cookieName) + '=' + escape(cookieValue)
			+ (expires ? '; expires=' + expires.toGMTString() : '')
			+ (path ? '; path=' + path : '')
			+ (domain ? '; domain=' + domain : '')
			+ (secure ? '; secure' : '');
	};

dTree.prototype.getCookie = function(cookieName) // [Cookie] Gets a value from a cookie
	{
		var cookieValue = '';
		var posName = document.cookie.indexOf(escape(cookieName) + '=');
		if (posName != -1) 
			{
				var posValue = posName + (escape(cookieName) + '=').length;
				var endPos = document.cookie.indexOf(';', posValue);
				if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
				else cookieValue = unescape(document.cookie.substring(posValue));
			}
		return (cookieValue);
	};

dTree.prototype.updateCookie = function() // [Cookie] Returns ids of open nodes as a string
	{
		var str = '';
		for (var n=0; n<this.aNodes.length; n++) 
			{
	
				if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) 
					{
						if (str) str += '.';
						str += this.aNodes[n].id;
					}
			}
		this.setCookie('co' + this.obj, str);
	};

dTree.prototype.isOpen = function(id) // [Cookie] Checks if a node id is in a cookie
	{
		var aOpen = this.getCookie('co' + this.obj).split('.');
		for (var n=0; n<aOpen.length; n++)
			if (aOpen[n] == id) return true;
				return false;
	};

if (!Array.prototype.push) // If Push and pop is not implemented by the browser
	{
	Array.prototype.push = function array_push() 
		{
			for(var i=0;i<arguments.length;i++)
				this[this.length]=arguments[i];
				return this.length;
		}
};

if (!Array.prototype.pop) 
	{
		Array.prototype.pop = function array_pop() 
			{
				lastElement = this[this.length-1];
				this.length = Math.max(this.length-1,0);
				return lastElement;
			}
	};