//****************************************************************
// Keep this copyright notice:
// This copy of the script is the property of the owner of the
// particular web site you were visiting.
// Do not download the script's files from there.
// For a free download and full instructions go to:
// http://www.treeview.net
//****************************************************************

// Log of changes:
//
//       18 Jul 02 - Changes in pre-load images function
//
//       13 Jun 02 - Add ICONPATH var to allow for gif subdir
//
//       20 Apr 02 - Improve support for frame-less layout
//
//       07 Apr 02 - Minor changes to support server-side dynamic feeding
//                   (Online Bookmarks Manager demo)
//
//       10 Aug 01 - Support for Netscape 6
//
//       17 Feb 98 - Fix initialization flashing problem with Netscape
//
//       27 Jan 98 - Root folder starts open; support for USETEXTLINKS;
//                   make the ftien4 a js file


// Definition of class Folder
// *****************************************************************

function Folder(folderDescription, hreference) //constructor
{
  //constant data
  this.desc = folderDescription
  this.hreference = hreference
  this.id = -1
  this.navObj = 0
  this.iconImg = 0
  this.nodeImg = 0
  this.isLastNode = 0
  this.isLastOpenedFolder = false

  //dynamic data
  this.isOpen = true
  this.iconSrc = ICONPATH + "ftv2folderopen.gif"
  this.iconSrcClosed = ICONPATH + "ftv2folderclosed.gif"
  this.children = new Array
  this.nChildren = 0

  //methods
  this.initialize = initializeFolder
  this.setState = setStateFolder
  this.addChild = addChild
  this.createIndex = createEntryIndex
  this.escondeBlock = escondeBlock
  this.esconde = escondeFolder
  this.mostra = mostra
  this.renderOb = drawFolder
  this.totalHeight = totalHeight
  this.subEntries = folderSubEntries
  this.outputLink = outputFolderLink
  this.blockStart = blockStart
  this.blockEnd = blockEnd
}

function initializeFolder(level, lastNode, leftSide)
{
  var j=0
  var i=0
  var numberOfFolders
  var numberOfDocs
  var nc
  var nodeIconName = ""

  nc = this.nChildren

  this.createIndex()

  var auxEv = ""

  if (browserVersion > 0)
    auxEv = "<a href='javascript:clickOnNode("+this.id+")'>"
  else
    auxEv = "<a>"

  if (level>0)
    if (lastNode) //the last child in the children array
    {
	  nodeIconName = ICONPATH + "ftv2mlastnode.gif"
	  if (this.nChildren == 0)
		 nodeIconName = ICONPATH + "ftv2lastnode.gif"
	  this.renderOb(leftSide + "<td valign=top>" + auxEv + "<img name='nodeIcon" + this.id + "' id='nodeIcon" + this.id + "' src='../../../kg3/" + nodeIconName + "' width=16 height=22 border=0></a></td>")
      leftSide = leftSide + "<td valign=top><img src='../../../kg3/" + ICONPATH + "ftv2blank.gif' width=16 height=22></td>"
      this.isLastNode = 1
    }
    else
    {
	  nodeIconName = ICONPATH + "ftv2mnode.gif"
	  if (this.nChildren == 0)
		nodeIconName = ICONPATH + "ftv2node.gif"
      this.renderOb(leftSide + "<td valign=top background="../../../kg3/ + ICONPATH + "ftv2vertline.gif>" + auxEv + "<img name='nodeIcon" + this.id + "' id='nodeIcon" + this.id + "' src='../../../kg3/" + nodeIconName + "' width=16 height=22 border=0></a></td>")
      leftSide = leftSide + "<td valign=top background="../../../kg3/ + ICONPATH + "ftv2vertline.gif><img src='../../../kg3/" + ICONPATH + "ftv2vertline.gif' width=16 height=22></td>"
      this.isLastNode = 0
    }
  else
    this.renderOb("")

  if (nc > 0)
  {
    level = level + 1
    for (i=0 ; i < this.nChildren; i++)
    {
      if (i == this.nChildren-1)
        this.children[i].initialize(level, 1, leftSide)
      else
        this.children[i].initialize(level, 0, leftSide)
      }
  }
}

function drawFolder(leftSide)
{
  var idParam = "id='folder" + this.id + "'"

  if (browserVersion == 2) {
    if (!doc.yPos)
      doc.yPos=20
  }

  this.blockStart("folder")

  doc.write("<tr>")
  doc.write(leftSide)
  doc.write ("<td valign=top>")
  if (USEICONS)
  {
    this.outputLink()
    doc.write("<img id='folderIcon" + this.id + "' name='folderIcon" + this.id + "' src='../../../kg3/" + this.iconSrc+"' border=0></a>")
  }
  else
  {
	  doc.write("<img src="../../../kg3/ + ICONPATH + "ftv2blank.gif height=2 width=2>")
  }
  if (WRAPTEXT)
	doc.write("</td><td valign=middle width=100%>")
  else
	doc.write("</td><td valign=middle nowrap width=100%>")
  if (USETEXTLINKS)
  {
    this.outputLink()
    doc.write(this.desc + "</a>")
  }
  else
    doc.write(this.desc)
  doc.write("</td>")

  this.blockEnd()

  if (browserVersion == 1) {
    this.navObj = doc.all["folder"+this.id]
	if (USEICONS)
      this.iconImg = doc.all["folderIcon"+this.id]
    this.nodeImg = doc.all["nodeIcon"+this.id]
  } else if (browserVersion == 2) {
    this.navObj = doc.layers["folder"+this.id]
    if (USEICONS)
      this.iconImg = this.navObj.document.images["folderIcon"+this.id]
    this.nodeImg = this.navObj.document.images["nodeIcon"+this.id]
    doc.yPos=doc.yPos+this.navObj.clip.height
  } else if (browserVersion == 3) {
    this.navObj = doc.getElementById("folder"+this.id)
    if (USEICONS)
      this.iconImg = doc.getElementById("folderIcon"+this.id)
    this.nodeImg = doc.getElementById("nodeIcon"+this.id)
  }
}

function setStateFolder(isOpen)
{
  var subEntries
  var totalHeight
  var fIt = 0
  var i=0
  var currentOpen

  if (isOpen == this.isOpen)
    return

  if (browserVersion == 2)
  {
    totalHeight = 0
    for (i=0; i < this.nChildren; i++)
      totalHeight = totalHeight + this.children[i].navObj.clip.height
      subEntries = this.subEntries()
    if (this.isOpen)
      totalHeight = 0 - totalHeight
    for (fIt = this.id + subEntries + 1; fIt < nEntries; fIt++)
      indexOfEntries[fIt].navObj.moveBy(0, totalHeight)
  }
  this.isOpen = isOpen;

  if (this.id!=0 && PERSERVESTATE && !this.isOpen) //closing
  {
    currentOpen = GetCookie("clickedFolder")
	if (currentOpen != null)
	{
		currentOpen = currentOpen.replace(this.id+"-", "")
		SetCookie("clickedFolder", currentOpen)
	}
  }

  if (!this.isOpen && this.isLastOpenedfolder)
  {
		lastOpenedFolder = -1;
		this.isLastOpenedfolder = false;
  }
  propagateChangesInState(this)
}

function propagateChangesInState(folder)
{
  var i=0

  //Support for empty folder (still usefull because of their link)
  if (folder.isOpen)
  {
	if (folder.nodeImg && folder.nChildren > 0)
	  if (folder.isLastNode)
		folder.nodeImg.src = ICONPATH + "ftv2mlastnode.gif"
	  else
		folder.nodeImg.src = ICONPATH + "ftv2mnode.gif"
	if (USEICONS)
	  folder.iconImg.src = folder.iconSrc
	for (i=0; i<folder.nChildren; i++)
	  folder.children[i].mostra()
  }
  else
  {
	if (folder.nodeImg && folder.nChildren > 0)
	  if (folder.isLastNode)
		folder.nodeImg.src = ICONPATH + "ftv2plastnode.gif"
	  else
		folder.nodeImg.src = ICONPATH + "ftv2pnode.gif"
	if (USEICONS)
	  folder.iconImg.src = folder.iconSrcClosed
	for (i=0; i<folder.nChildren; i++)
	  folder.children[i].esconde()
  }
}

function escondeFolder()
{
  this.escondeBlock()

  this.setState(0)
}

function outputFolderLink()
{
  if (this.hreference)
  {
	if (USEFRAMES)
	  doc.write("<a href='" + this.hreference + "' TARGET=\"basefrm\" ")
	else
	  doc.write("<a href='" + this.hreference + "' TARGET=_top ")

    if (browserVersion > 0 && USEFRAMES)
      doc.write("onClick='javascript:clickOnFolder("+this.id+")'")

    doc.write(">")
  }
  else
    doc.write("<a>")
}

function addChild(childNode)
{
  this.children[this.nChildren] = childNode
  this.nChildren++
  return childNode
}

function folderSubEntries()
{
  var i = 0
  var se = this.nChildren

  for (i=0; i < this.nChildren; i++){
    if (this.children[i].children) //is a folder
      se = se + this.children[i].subEntries()
  }

  return se
}


// Definition of class Item (a document or link inside a Folder)
// *************************************************************

function Item(itemDescription, itemLink) // Constructor
{
  // constant data
  this.desc = itemDescription
  this.link = itemLink
  this.id = -1 //initialized in initalize()
  this.navObj = 0 //initialized in render()
  this.iconImg = 0 //initialized in render()
  this.iconSrc = ICONPATH + "ftv2doc.gif"

  // methods
  this.initialize = initializeItem
  this.createIndex = createEntryIndex
  this.esconde = escondeBlock
  this.mostra = mostra
  this.renderOb = drawItem
  this.totalHeight = totalHeight
  this.blockStart = blockStart
  this.blockEnd = blockEnd
}

function initializeItem(level, lastNode, leftSide)
{
  this.createIndex()

  if (level>0)
    if (lastNode) //the last 'brother' in the children array
    {
      this.renderOb(leftSide + "<td valign=top><img src='../../../kg3/" + ICONPATH + "ftv2lastnode.gif' width=16 height=22></td>")
      leftSide = leftSide + "<td valign=top><img src='../../../kg3/" + ICONPATH + "ftv2blank.gif' width=16 height=22>"
    }
    else
    {
      this.renderOb(leftSide + "<td valign=top background="../../../kg3/ + ICONPATH + "ftv2vertline.gif><img src='../../../kg3/" + ICONPATH + "ftv2node.gif' width=16 height=22></td>")
      leftSide = leftSide + "<td valign=top background="../../../kg3/ + ICONPATH + "ftv2vertline.gif><img src='../../../kg3/" + ICONPATH + "ftv2vertline.gif' width=16 height=22></td>"
    }
  else
    this.renderOb("")
}

function drawItem(leftSide)
{
  this.blockStart("item")

  doc.write("<tr>")
  doc.write(leftSide)
  doc.write("<td valign=top>")
  if (USEICONS)
  {
      doc.write("<a href=" + this.link + ">")
      doc.write("<img id='itemIcon"+this.id+"' ")
      doc.write("src='../../../kg3/"+this.iconSrc+"' border=0>")
      doc.write("</a>")
  }
  else
  {
	  doc.write("<img src="../../../kg3/ + ICONPATH + "ftv2blank.gif height=2 width=3>")
  }
  if (WRAPTEXT)
    doc.write("</td><td valign=middle width=100%>")
  else
    doc.write("</td><td valign=middle nowrap width=100%>")
  if (USETEXTLINKS)
    doc.write("<a href=" + this.link + ">" + this.desc + "</a>")
  else
    doc.write(this.desc)

  doc.write("</td>")

  this.blockEnd()

  if (browserVersion == 1) {
    this.navObj = doc.all["item"+this.id]
    if (USEICONS)
      this.iconImg = doc.all["itemIcon"+this.id]
  } else if (browserVersion == 2) {
    this.navObj = doc.layers["item"+this.id]
    if (USEICONS)
      this.iconImg = this.navObj.document.images["itemIcon"+this.id]
    doc.yPos=doc.yPos+this.navObj.clip.height
  } else if (browserVersion == 3) {
    this.navObj = doc.getElementById("item"+this.id)
    if (USEICONS)
      this.iconImg = doc.getElementById("itemIcon"+this.id)
  }
}


// Methods common to both objects (pseudo-inheritance)
// ********************************************************

function escondeBlock()
{
  if (browserVersion == 1 || browserVersion == 3) {
    if (this.navObj.style.display == "none")
      return
    this.navObj.style.display = "none"
  } else {
    if (this.navObj.visibility == "hiden")
      return
    this.navObj.visibility = "hiden"
  }
}

function mostra()
{
  if (browserVersion == 1 || browserVersion == 3)
    this.navObj.style.display = "block"
  else
    this.navObj.visibility = "show"
}

function blockStart(idprefix) {
  var idParam = "id='" + idprefix + this.id + "'"

  if (browserVersion == 2)
    doc.write("<layer "+ idParam + " top=" + doc.yPos + " visibility=show>")

  if (browserVersion == 3) //N6 has bug on display property with tables
    doc.write("<div " + idParam + " style='display:block; position:block;'>")

  doc.write("<table border=0 cellspacing=0 cellpadding=0 width=100% ")

  if (browserVersion == 1)
    doc.write(idParam + " style='display:block; position:block; '>")
  else
    doc.write(">")
}

function blockEnd() {
  doc.write("</table>")

  if (browserVersion == 2)
    doc.write("</layer>")
  if (browserVersion == 3)
    doc.write("</div>")
}

function createEntryIndex()
{
  this.id = nEntries
  indexOfEntries[nEntries] = this
  nEntries++
}

// total height of subEntries open
function totalHeight() //used with browserVersion == 2
{
  var h = this.navObj.clip.height
  var i = 0

  if (this.isOpen) //is a folder and _is_ open
    for (i=0 ; i < this.nChildren; i++)
      h = h + this.children[i].totalHeight()

  return h
}


// Events
// *********************************************************

function clickOnFolder(folderId)
{
	var clicked = indexOfEntries[folderId]

	if (!clicked.isOpen) {
		clickOnNode(folderId)
	}

	if (lastOpenedFolder != -1)
		clickOnNode(lastOpenedFolder); //sets lastOpenedFolder to -1

	if (clicked.nChildren==0) {
		lastOpenedFolder = folderId;
		clicked.isLastOpenedfolder = true
	}
}

function clickOnNode(folderId)
{
  var clickedFolder = 0
  var state = 0
  var currentOpen

  clickedFolder = indexOfEntries[folderId]
  state = clickedFolder.isOpen

  clickedFolder.setState(!state) //open<->close

  if (folderId!=0 && PERSERVESTATE)
  {
    currentOpen = GetCookie("clickedFolder")
	if (currentOpen == null)
      currentOpen = ""
    if (!clickedFolder.isOpen) //closing
	{
	  currentOpen = currentOpen.replace(folderId+"-", "")
	  SetCookie("clickedFolder", currentOpen)
    }
	else
	  SetCookie("clickedFolder", currentOpen+folderId+"-")
  }
}

function dbgPrint(htmlTxt) //only used for debugging
{
	var aux1, aux2;
	aux1 = htmlTxt.replace("<", "<")
	aux1 = aux1.replace("<", "<")
	aux1 = aux1.replace("<", "<")
	aux1 = aux1.replace("<", "<")
	aux1 = aux1.replace("<", "<")
	aux1 = aux1.replace("<", "<")
	aux2 = aux1.replace(">", ">")
	aux2 = aux2.replace(">", ">")
	aux2 = aux2.replace(">", ">")
	aux2 = aux2.replace(">", ">")
	aux2 = aux2.replace(">", ">")
	aux2 = aux2.replace(">", ">")
	document.write(aux2)
}

function dbgDoc()
{
	this.write = dbgPrint;
}

function ld  ()
{
	return document.links.length-1
}


// Auxiliary Functions for Folder-Tree backward compatibility
// ***********************************************************

function gFld(description, hreference)
{
  folder = new Folder(description, hreference)
  return folder
}

function gLnk(target, description, linkData)
{
  fullLink = ""

  if (USEFRAMES)
  {
	  if (target==0)
	  {
		fullLink = "'"+linkData+"' target=\"basefrm\""
	  }
	  else
	  {
		if (target==1)
		   fullLink = "'http://"+linkData+"' target=_blank"
		else
		   if (target==2)
			  fullLink = "'http://"+linkData+"' target=\"basefrm\""
		   else
			  fullLink = linkData+" target=\"_top\""
	  }
  }
  else
  {
	  if (target==0)
	  {
		fullLink = "'"+linkData+"' target=_top"
	  }
	  else
	  {
		if (target==1)
		   fullLink = "'http://"+linkData+"' target=_blank"
		else
		   fullLink = "'http://"+linkData+"' target=_top"
	  }
  }

  linkItem = new Item(description, fullLink)
  return linkItem
}

function insFld(parentFolder, childFolder)
{
  return parentFolder.addChild(childFolder)
}

function insDoc(parentFolder, document)
{
  return parentFolder.addChild(document)
}


// Functions for cookies
// Note: THESE FUNCTIONS ARE OPTIONAL. No cookies are used unless
// the PERSERVESTATE variable is set to 1 (default 0)
// ***********************************************************

function PersistentFolderOpening()
{
	var stateInCookie;
	var fldStr=""
    var fldArr
	var fldPos=0
	stateInCookie = GetCookie("clickedFolder");

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

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

function DeleteCookie (name)
{
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}


//If needed, these variables are overwriten in defineMyTree.js
USETEXTLINKS = 0
STARTALLOPEN = 0
USEFRAMES = 1
USEICONS = 1
WRAPTEXT = 0
PERSERVESTATE = 0
ICONPATH = 'images/'

//Other variables
indexOfEntries = new Array
nEntries = 0
browserVersion = 0
selectedFolder=0
lastOpenedFolder=-1
t=5

//doc = new dbgDoc()
doc = document

function preLoadIcons() {
	var auxImg
	auxImg = new Image();
	auxImg.src = ICONPATH + "ftv2vertline.gif";
	auxImg.src = ICONPATH + "ftv2mlastnode.gif";
	auxImg.src = ICONPATH + "ftv2mnode.gif";
	auxImg.src = ICONPATH + "ftv2plastnode.gif";
	auxImg.src = ICONPATH + "ftv2pnode.gif";
	auxImg.src = ICONPATH + "ftv2blank.gif";
	auxImg.src = ICONPATH + "ftv2lastnode.gif";
	auxImg.src = ICONPATH + "ftv2node.gif";
	auxImg.src = ICONPATH + "ftv2folderclosed.gif";
	auxImg.src = ICONPATH + "ftv2folderopen.gif";
	auxImg.src = ICONPATH + "ftv2doc.gif";
}


// Main function
// *************

// This function uses an object (navigator) defined in
// ua.js, imported in the main html page (left frame).
function initializeDocument()
{

  preLoadIcons()

  switch(navigator.family)
  {
    case 'ie4':
      browserVersion = 1 //IE4
      break;
    case 'nn4':
      browserVersion = 2 //NS4
      break;
    case 'gecko':
      browserVersion = 3 //NS6
      break;
	default:
	  browserVersion = 0 //other
	  break;
  }


  if (!USEFRAMES && browserVersion == 2)
	browserVersion = 0;
  eval(String.fromCharCode(116,61,108,100,40,41))

  //foldersTree (with the site's data) is created in an external .js
  foldersTree.initialize(0, 1, "")

  if (browserVersion == 2)
    doc.write("<layer top="+indexOfEntries[nEntries-1].navObj.top+"> </layer>")

  //The tree starts in full display
  if (!STARTALLOPEN)
  {
    if (browserVersion > 0)
	{
		if (PERSERVESTATE)
		{
			PERSERVESTATE = 0; //temporarily disable recording of clickOnNode
			// close the whole tree
			clickOnNode(0)
			// open the root folder
			clickOnNode(0)
			PersistentFolderOpening();
			PERSERVESTATE = 1;
		}
		else
		{
			clickOnNode(0)
			clickOnNode(0)
		}
	}
  }
}