var t_image_dirclose = new Image();
	t_image_dirclose.src="pic/treemenu/fclose.gif";
var t_image_diropen = new Image();
	t_image_diropen.src="pic/treemenu/fopen.gif";
var t_image_item = new Image();
	t_image_item.src="pic/treemenu/fitem.gif";
var cookieCutter = '^'




function setExpandedIco(id){
	var i=document.getElementById(id+'_iconimg');
	i.src=t_image_diropen.src;
}

function setCollapsedIco(id){
	var i=document.getElementById(id+'_iconimg');
	i.src=t_image_dirclose.src;
}

function OpenFolder(id)
{
	var l=document.getElementById(id+"_member");
	var s=l.style||l;

	s.visibility='visible';
	s.display='block';
	setExpandedIco(id);
	return true;
}


function CloseFolder(id)
{
	var l=document.getElementById(id+"_member");
	var s=l.style||l;

	s.visibility='hidden';
	s.display='none';
	setCollapsedIco(id);
	return false;
}


function toggleLayer(id){
	var l=document.getElementById(id+"_member");
	var s=l.style||l;

	if(s.visibility=='hidden'){
		return OpenFolder(id);
	}
	else{
		return CloseFolder(id);
	}
}


function toggleNode(id){
	if(toggleLayer(id)){
		AddNode(id);
	}
	else{
		
		RemoveNode(id);
	}
}


function GetCookie(name)
{  
  	var arg = name + "=";  
	var alen = arg.length;  
	var clen = document.cookie.length;  
	var i = 0;  

	while (i < clen) {    
		var j = i + alen;    
		if (document.cookie.substring(i, j) == arg)      
			return getCookieVal (j);    
		i = document.cookie.indexOf(" ", i) + 1;    
		if (i == 0) break;   
	}  
	return null;
}

function getCookieVal(offset) {  
	var endstr = document.cookie.indexOf (";", offset);  
	if (endstr == -1)    
	endstr = document.cookie.length;  
	return unescape(document.cookie.substring(offset, endstr));
}

function SetCookie(name, value) 
{  
	var argv = SetCookie.arguments;  
	var argc = SetCookie.arguments.length;  
	var expires = (argc > 2) ? argv[2] : null;  
	//var path = (argc > 3) ? argv[3] : null;  
	var domain = (argc > 4) ? argv[4] : null;  
	var secure = (argc > 5) ? argv[5] : false;  
	var path = "/"; //allows the tree to remain open across pages with diff names & paths

	document.cookie = name + "=" + escape (value) + 
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + 
	((path == null) ? "" : ("; path=" + path)) +  
	((domain == null) ? "" : ("; domain=" + domain)) +    
	((secure == true) ? "; secure" : "");
}

function AddNode(node)
{
	currentOpen = GetCookie("UnhideDiv");
	if(currentOpen == null){
		currentOpen = node+cookieCutter;
	}
	else{
		currentOpen = currentOpen+node+cookieCutter;
	}
	SetCookie("UnhideDiv", currentOpen);
}


function RemoveNode(node)
{
	currentOpen = GetCookie("UnhideDiv");
	if (currentOpen != null) {
		currentOpen = currentOpen.replace(node+cookieCutter, "");
		SetCookie("UnhideDiv", currentOpen);
	}
}


function OpenFolders()
{
  	var stateInCookie;
  	var fldStr=""
  	var fldArr
  	var fldPos=0
  	var id
  	var nodeObj
  	
	stateInCookie = GetCookie("UnhideDiv");

  	if(stateInCookie!=null)
  	{
    		fldArr = stateInCookie.split(cookieCutter)
    		for (fldPos=0; fldPos<fldArr.length; fldPos++)
    		{
      			fldStr=fldArr[fldPos]
      			if (fldStr != "") {
				OpenFolder(fldStr);
      			}
    		}
 	}
}