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

ddtreemenu.closefolder=""; //set image path to "closed" folder image
ddtreemenu.openfolder=""; //set image path to "open" folder image
//////////No need to edit beyond here///////////////////////////

ddtreemenu.createTree=function(treeid, curEl, 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, curEl)
	//if enable persist feature
	if (enablepersist==true){ 
		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.expandSelectedSubmenu(treeid,curEl);	
}

ddtreemenu.buildSubTree=function(treeid, ulelement, index, curEl){
	//ulelement.parentNode.className="submenu"
	//if cookie exists (persisteduls[treeid] is an array versus "" string)
	if (typeof persisteduls[treeid]=="object"){ 
		if (ddtreemenu.searcharray(persisteduls[treeid], index)){
			ulelement.setAttribute("rel", "open")
			ulelement.style.display="block"
			//ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
		}else
			ulelement.setAttribute("rel", "closed")
	} //end cookie persist code
	
	//if no cookie and UL has NO rel attribute explicted added by user
	else if (ulelement.getAttribute("rel")==null || ulelement.getAttribute("rel")==false) {
		ulelement.setAttribute("rel", "closed")
		//ulelement.parentNode.className = 'menuLevel1';
	}	
	//else if no cookie and this UL has an explicit rel value of "open"
	else if (ulelement.getAttribute("rel")=="open") 
		//expand this UL plus all parent ULs (so the most inner UL is revealed!)
		ddtreemenu.expandSubTree(treeid, ulelement) 
		
	ulelement.parentNode.onclick=function(e){	
		
		if(ulelement.parentNode.parentNode.id == treeid){
			ddtreemenu.flatten(treeid, 'contact')	
		}
		var submenu=this.getElementsByTagName("ul")[0]
			if (submenu.getAttribute("rel")=="closed"){
				submenu.style.display="block"
				submenu.setAttribute("rel", "open")
				//ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
				ulelement.parentNode.className = ulelement.parentNode.className+' higlite';
			}else if (submenu.getAttribute("rel")=="open"){
				submenu.style.display="none"
				submenu.setAttribute("rel", "closed")
				//ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.closefolder+")"
			}
		ddtreemenu.HigliteMenu(treeid,curEl);		
	}
		
	ulelement.onclick=function(e){
		ddtreemenu.preventpropagate(e)
	}
		
}

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

//expand or contract all UL elements
ddtreemenu.flatten=function(treeid, action){ 
	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("+ddtreemenu.openfolder+")" : "url("+ddtreemenu.closefolder+")"
		var className = ultags[i].parentNode.className;
		var elementLevel = className.substring(9,10)
		ultags[i].parentNode.className = 'menuLevel'+elementLevel;
	}
}

//store index of opened ULs relative to other ULs in Tree into cookie
ddtreemenu.rememberstate=function(treeid, durationdays){ 
	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//////////////////////

//get cookie value
ddtreemenu.getCookie=function(Name){ 
	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 ""
}

//set cookei value
ddtreemenu.setCookie=function(name, value, days){ 
	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=/";
}

//searches an array for the entered value. If found, delete value from array
ddtreemenu.searcharray=function(thearray, value){ 
	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
}

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

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

//opens the menu in dependance of the opened content
ddtreemenu.expandSelectedSubmenu=function(treeid, elementId){ 
	
	var curElement = document.getElementById(elementId);
	
	if(!(curElement == null)){
		var curClass = curElement.className;
		var subMenu = curElement.getElementsByTagName("ul")[0];
		curElement.className = curClass+' higlite';
		
		if(subMenu == undefined){
			subMenu = curElement.parentNode;
		}
		ddtreemenu.expandSubTree(treeid,subMenu);
	}	
}

//opens the menu in dependance of the opened content
ddtreemenu.HigliteMenu=function(treeid, elementId){ 

	var curElement = document.getElementById(elementId);
	var rootnode=document.getElementById(treeid)
		
	if(!(curElement == null)){
		while (curElement.parentNode!=rootnode){
			curElement = curElement.parentNode
		}
		curElement.className = 'menuLevel1 higlite';
	}	
}