var persisteduls = new Object()
var ddtreemenu = new Object()

// to juz nie obowiazuje
ddtreemenu.closefolder = "/libs/simpletree/closed.gif" // set image path to
														// "closed" folder image
ddtreemenu.openfolder = "/libs/simpletree/open.gif" // set image path to "open"
													// folder image

// ////////No need to edit beyond here///////////////////////////

ddtreemenu.createTree = function(treeid, enablepersist, persistdays)
{
	var ultags = document.getElementById(treeid).getElementsByTagName("ul")
	if (typeof persisteduls[treeid] == "undefined")
		persisteduls[treeid] = (enablepersist == true && ddtreemenu.getCookie(treeid) != "") ? ddtreemenu.getCookie(treeid).split(",") : ""
	for ( var i = 0; i < ultags.length; i++)
		ddtreemenu.buildSubTree(treeid, ultags[i], i)
	if (enablepersist == true)
	{ // if enable persist feature
		var durationdays = (typeof persistdays == "undefined") ? 1 : parseInt(persistdays)
		ddtreemenu.dotask(window, function()
		{
			ddtreemenu.rememberstate(treeid, durationdays)
		}, "unload") // save opened UL indexes on body unload
	}
}

ddtreemenu.buildSubTree = function(treeid, ulelement, index)
{
	ulelement.parentNode.className = "submenu"
	if (typeof persisteduls[treeid] == "object")
	{ // if cookie exists (persisteduls[treeid] is an array versus "" string)
		if (ddtreemenu.searcharray(persisteduls[treeid], index))
		{
			ulelement.setAttribute("rel", "open")
			ulelement.style.display = "block"
			
			$(ulelement.parentNode).removeClass('submenu').addClass('submenuOpen');
			//ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
		}
		else
			ulelement.setAttribute("rel", "closed")
	} // end cookie persist code
	else if (ulelement.getAttribute("rel") == null || ulelement.getAttribute("rel") == false) // if
																								// no
																								// cookie
																								// and
																								// UL
																								// has
																								// NO
																								// rel
																								// attribute
																								// explicted
																								// added
																								// by
																								// user
		ulelement.setAttribute("rel", "closed")
	else if (ulelement.getAttribute("rel") == "open") // else if no cookie and
														// this UL has an
														// explicit rel value of
														// "open"
		ddtreemenu.expandSubTree(treeid, ulelement) // expand this UL plus all
													// parent ULs (so the most
													// inner UL is revealed!)
	ulelement.parentNode.onclick = function(e)
	{
		var submenu = this.getElementsByTagName("ul")[0]
		if (submenu.getAttribute("rel") == "closed")
		{
			submenu.style.display = "block"
			submenu.setAttribute("rel", "open")
			$(ulelement.parentNode).removeClass('submenu').addClass('submenuOpen');
			// ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
		}
		else if (submenu.getAttribute("rel") == "open")
		{
			submenu.style.display = "none"
			submenu.setAttribute("rel", "closed")
			$(ulelement.parentNode).removeClass('submenuOpen').addClass('submenu');
			// ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.closefolder + ")"
		}
		ddtreemenu.preventpropagate(e)
	}
	ulelement.onclick = function(e)
	{
		ddtreemenu.preventpropagate(e)
	}
}


ddtreemenu.expandSubTree = function(treeid, ulelement)
{ // expand a UL element and any of its parent ULs
	var rootnode = document.getElementById(treeid)
	var currentnode = ulelement
	currentnode.style.display = "block"
	$(currentnode.parentNode).removeClass('submenu').addClass('submenuOpen');
	//currentnode.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
	while (currentnode != rootnode)
	{
		if (currentnode.tagName == "UL")
		{ // if parent node is a UL, expand it too
			currentnode.style.display = "block"
			currentnode.setAttribute("rel", "open") // indicate it's open
			$(currentnode.parentNode).removeClass('submenu').addClass('submenuOpen');
			//currentnode.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
		}
		currentnode = currentnode.parentNode
	}
}

ddtreemenu.flatten = function(treeid, action)
{ // expand or contract all UL elements
	var ultags = document.getElementById(treeid).getElementsByTagName("ul")
	for ( var i = 0; i < ultags.length; i++)
	{
		ultags[i].style.display = (action == "expand") ? "block" : "none"
		var relvalue = (action == "expand") ? "open" : "closed"
		ultags[i].setAttribute("rel", relvalue)
		$(ultags[i].parentNode).toggleClass('submenu', !(action == "expand")).toggleClass('submenuOpen', (action == "expand"));
		//ultags[i].parentNode.style.backgroundImage = (action == "expand") ? "url(" + ddtreemenu.openfolder + ")" : "url(" + ddtreemenu.closefolder + ")"
	}
}

ddtreemenu.rememberstate = function(treeid, durationdays)
{ // store index of opened ULs relative to other ULs in Tree into cookie
	var ultags = document.getElementById(treeid).getElementsByTagName("ul")
	var openuls = new Array()
	for ( var i = 0; i < ultags.length; i++)
	{
		if (ultags[i].getAttribute("rel") == "open")
			openuls[openuls.length] = i // save the index of the opened UL
										// (relative to the entire list of ULs)
										// as an array element
	}
	if (openuls.length == 0) // if there are no opened ULs to save/persist
		openuls[0] = "none open" // set array value to string to simply
									// indicate all ULs should persist with
									// state being closed
	ddtreemenu.setCookie(treeid, openuls.join(","), durationdays) // populate
																	// cookie
																	// with
																	// value
																	// treeid=1,2,3
																	// etc
																	// (where
																	// 1,2...
																	// are the
																	// indexes
																	// of the
																	// opened
																	// ULs)
}

// //A few utility functions below//////////////////////

ddtreemenu.getCookie = function(Name)
{ // get cookie value
	var re = new RegExp(Name + "=[^;]+", "i"); // construct RE to search for
												// target name/value pair
	if (document.cookie.match(re)) // if cookie found
		return document.cookie.match(re)[0].split("=")[1] // return its value
	return ""
}

ddtreemenu.setCookie = function(name, value, days)
{ // set cookei value
	var expireDate = new Date()
	// set "expstring" to either future or past date, to set or delete cookie,
	// respectively
	var expstring = expireDate.setDate(expireDate.getDate() + parseInt(days))
	document.cookie = name + "=" + value + "; expires=" + expireDate.toGMTString() + "; path=/";
}

ddtreemenu.searcharray = function(thearray, value)
{ // searches an array for the entered value. If found, delete value from
	// array
	var isfound = false
	for ( var i = 0; i < thearray.length; i++)
	{
		if (thearray[i] == value)
		{
			isfound = true
			thearray.shift() // delete this element from array for efficiency
								// sake
			break
		}
	}
	return isfound
}

ddtreemenu.preventpropagate = function(e)
{ // prevent action from bubbling upwards
	if (typeof e != "undefined")
		e.stopPropagation()
	else
		event.cancelBubble = true
}

ddtreemenu.dotask = function(target, functionref, tasktype)
{ // assign a function to execute to an event handler (ie: onunload)
	var tasktype = (window.addEventListener) ? tasktype : "on" + tasktype
	if (target.addEventListener)
		target.addEventListener(tasktype, functionref, false)
	else if (target.attachEvent)
		target.attachEvent(tasktype, functionref)
}