/*--------------------------------------------------
 dTree 2.05 | www.destroydrop.com/javascript/tree/ 
---------------------------------------------------
 Copyright (c) 2002-2003 Geir Landr?              

 This script can be used freely as long as all     

 copyright messages are intact.                    

 Updated: 17.04.2003                               
--------------------------------------------------*/
//*******************	Node object	*********************

function Node(id, pid, name, url, title, target, icon, iconOpen, open)
{	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;
};
/******************* Tree object	********************/
function dTree(objName)
{	this.config =
	{	target					: null,
		folderLinks			: true,
		useSelection		: true,
		useCookies			: true,
		useLines				: true,
		useIcons				: true,
		useStatusText		: false,
		closeSameLevel	: false,
		inOrder					: false
	}
	this.icon =
	{	root				: './scripts/img/base.gif',
		folder			: './scripts/img/folder.gif',
		folderOpen	: './scripts/img/folderopen.gif',
		node				: './scripts/img/page.gif',
		empty				: './scripts/img/empty.gif',
		line				: './scripts/img/line.gif',
		join				: './scripts/img/join.gif',
		joinBottom	: './scripts/img/joinbottom.gif',
		plus				: './scripts/img/plus.gif',
		plusBottom	: './scripts/img/plusbottom.gif',
		minus				: './scripts/img/minus.gif',
		minusBottom	: './scripts/img/minusbottom.gif',
		nlPlus			: './scripts/img/nolines_plus.gif',
		nlMinus			: './scripts/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;
};
//************* Adds a new node to the node array	****************
dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open)
{	this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open);	}
//*****************	Open/close all nodes	*********************
dTree.prototype.openAll = function(){	this.oAll(true);	};
dTree.prototype.closeAll = function(){	this.oAll(false);	};
//***************** Outputs the tree to the page	*****************
dTree.prototype.toString = function()
{	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;
}
//*****************	Creates the tree structure	*******************
dTree.prototype.addNode = function(pNode)
{	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;
}
//************** Creates the node icon, url and text	****************
dTree.prototype.node = function(node, nodeId)
{	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 += '<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;
}
//******************	Adds the empty and line icons	*******************
dTree.prototype.indent = function(node, nodeId)
{	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;
}
//*******************	Checks if a node has any children and if it is the last sibling	*************
dTree.prototype.setCS = function(node)
{	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;
}
//*************** Returns the selected node	*******************
dTree.prototype.getSelected = function()
{	var sn = this.getCookie('cs' + this.obj);
	return (sn) ? sn : null;
};
//************** Highlights the selected node	*****************
dTree.prototype.s = function(id)
{	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);
	}
}
//****************	Toggle Open or close	********************
dTree.prototype.o = function(id)
{	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();
}
//****************	Open or close all nodes	******************
dTree.prototype.oAll = function(status)
{	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();
}
//************ Opens the tree to a specific node	**************
dTree.prototype.openTo = function(nId, bSelect, bFirst)
{	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);
}
// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(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]);
		}
	}
}
//************	Closes all children of a node	****************
dTree.prototype.closeAllChildren = function(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]);		
		}
	}
}
//************ Change the status of a node(open or closed)	************
dTree.prototype.nodeStatus = function(status, id, bottom)
{	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';
}
//****************** [Cookie] Clears a cookie	******************
dTree.prototype.clearCookie = function()
{	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);
}
//************** [Cookie] Sets value in a cookie	**************
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure)
{	document.cookie = escape(cookieName) + '=' + escape(cookieValue) + (expires ? '; expires=' + expires.toGMTString() : '')
		+ (path ? '; path=' + path : '') + (domain ? '; domain=' + domain : '')	+ (secure ? '; secure' : '');
};
//*************	[Cookie] Gets a value from a cookie	*************
dTree.prototype.getCookie = function(cookieName)
{	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);
}
//************* [Cookie] Returns ids of open nodes as a string	*************
dTree.prototype.updateCookie = function()
{	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);
}
//************* [Cookie] Checks if a node id is in a cookie	*************
dTree.prototype.isOpen = function(id)
{	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 Push and pop is not implemented by the browser	***********
if (!Array.prototype.push)
{	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;
	}
}