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

ddtreemenu.closefolder = "nolines_plus.gif" // set image path to "closed" folder
// image
ddtreemenu.openfolder = "nolines_minus.gif" // set image path to "open" folder
// image

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

ddtreemenu.createTree = function(treeid, enablepersist, persistdays) {

	if (document.getElementById(treeid)) {

		if (document.getElementById(treeid).getElementsByTagName("ul")) {

			var ultags = document.getElementById(treeid).getElementsByTagName(
					"ul");
			
			//var inputtags = document.getElementById(treeid).getElementsByTagName(
			//"input");

			if (typeof persisteduls[treeid] == "undefined") {
				//persisteduls[treeid] = (enablepersist == true && ddtreemenu
				//		.getCookie(treeid) != "") ? ddtreemenu
				//		.getCookie(treeid).split(",") : ""
				 persisteduls[treeid] = ""

			}

			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.style.backgroundImage = "url(jscripts/tree/"
					+ 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) {
		
		if (e == "[object MouseEvent]")  {
			
			//we dont want to expand/contact if user checks the checkbox
			if (e.target == "[object HTMLLIElement]")  {
				
				var submenu = this.getElementsByTagName("ul")[0]
                               
				if (submenu.getAttribute("rel") == "closed") {
					submenu.style.display = "block"
					submenu.setAttribute("rel", "open")
					ulelement.parentNode.style.backgroundImage = "url(jscripts/tree/"
							+ ddtreemenu.openfolder + ")"
				} else if (submenu.getAttribute("rel") == "open") {
					submenu.style.display = "none"
					submenu.setAttribute("rel", "closed")
					ulelement.parentNode.style.backgroundImage = "url(jscripts/tree/"
							+ 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.style.backgroundImage = "url(jscripts/tree/"
			+ 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.style.backgroundImage = "url(jscripts/tree/"
					+ 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.style.backgroundImage = (action == "expand") ? "url(jscripts/tree/"
				+ ddtreemenu.openfolder + ")"
				: "url(jscripts/tree/" + 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)
}