//****************************************************************
// 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.geocities.com/marcelino_martins/foldertree.html
//
// Author: Marcelino Alves Martins (http://www.mmartins.com)
// 1997--2001.
//****************************************************************

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

  this.isOpen = true
//  this.iconSrc = "ftv2folderopen.gif"
  this.iconSrc = opengif;
  this.children = new Array
  this.nChildren = 0

  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

  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
    {
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' id='nodeIcon" + this.id + "' src='"+mlastnodegif+"' width=16 height=22 border=0></a>")
      leftSide = leftSide + "<img src='"+blankgif+"' width=16 height=22>"
      this.isLastNode = 1
    }
    else
    {
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' id='nodeIcon" + this.id + "' src='"+mnodegif+"' width=16 height=22 border=0></a>")
      leftSide = leftSide + "<img src='"+vertlinegif+"' width=16 height=22>"
      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 setStateFolder(isOpen)
{
  var subEntries
  var totalHeight
  var fIt = 0
  var i=0

  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
  propagateChangesInState(this)
}

function propagateChangesInState(folder)
{
  var i=0

  if (folder.isOpen)
  {
    if (folder.nodeImg)
      if (folder.isLastNode)
        folder.nodeImg.src = mlastnodegif
      else
            folder.nodeImg.src = mnodegif
    folder.iconImg.src = opengif
    for (i=0; i<folder.nChildren; i++)
      folder.children[i].mostra()
  }
  else
  {
    if (folder.nodeImg)
      if (folder.isLastNode)
        folder.nodeImg.src = plastnodegif
      else
            folder.nodeImg.src = pnodegif
    folder.iconImg.src = closedgif
    for (i=0; i<folder.nChildren; i++)
      folder.children[i].esconde()
  }
}

function escondeFolder()
{
  this.escondeBlock()

  this.setState(0)
}

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

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

  this.blockStart("folder")

  doc.write("<tr><td>")
  doc.write(leftSide)
  this.outputLink()
  doc.write("<img id='folderIcon" + this.id + "' name='folderIcon" + this.id + "' src='" + this.iconSrc+"' border=0></a>")
  doc.write("</td><td valign=middle nowrap>")
  this.outputLink()
  doc.write(this.desc + "</a>")
  doc.write("</td>")

  this.blockEnd()

  if (browserVersion == 1) {
    this.navObj = doc.all["folder"+this.id]
    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]
    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)
    this.iconImg = doc.getElementById("folderIcon"+this.id)
    this.nodeImg = doc.getElementById("nodeIcon"+this.id)
  }
}

function outputFolderLink()
{
  if (this.hreference)
  {
    doc.write("<a href='" + this.hreference + "' TARGET=\"context\" ")
    if (browserVersion > 0)
      doc.write("onClick='javascript:clickOnFolder("+this.id+")'")
    doc.write(">")
  }
  else
  doc.write("<a href='javascript:clickOnFolder("+this.id+")'>")
}

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
}

function Item(itemDescription, itemLink, gifName) // Constructor
{
  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 = gifName

  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)
    {
      this.renderOb(leftSide + "<img src='"+lastnodegif+"' width=16 height=22>")
      leftSide = leftSide + "<img src='"+blankgif+"' width=16 height=22>"
    }
    else
    {
      this.renderOb(leftSide + "<img src='"+nodegif+"' width=16 height=22>")
      leftSide = leftSide + "<img src='"+vertlinegif+"' width=16 height=22>"
    }
  else
    this.renderOb("")
}

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

  doc.write("<tr><td>")
  doc.write(leftSide)
  doc.write("<a href=" + this.link + ">")
  doc.write("<img id='itemIcon"+this.id+"' ")
  doc.write("src='"+this.iconSrc+"' border=0>")
  doc.write("</a>")
  doc.write("</td><td valign=middle nowrap>")
  doc.write("<a href=" + this.link + ">" + this.desc + "</a>")

  this.blockEnd()

  if (browserVersion == 1) {
    this.navObj = doc.all["item"+this.id]
    this.iconImg = doc.all["itemIcon"+this.id]
  } else if (browserVersion == 2) {
    this.navObj = doc.layers["item"+this.id]
    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)
    this.iconImg = doc.getElementById("itemIcon"+this.id)
  }
}

function mostra()
{
  if (browserVersion == 1 || browserVersion == 3) {
     var str = new String(doc.links[0])
     if (str.slice(16,20) != "ins.")
            return
  }

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

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

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

  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 ")

  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++
}

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
}

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

    clickOnNode(folderId)

  return

  if (clicked.isSelected)
    return
}

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

  clickedFolder = indexOfEntries[folderId]
  state = clickedFolder.isOpen

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

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

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

  switch(target)
  {
     case 0:
        fullLink = "'"+linkData+"' " + 'target="context"'
        break;
     case 3:
        fullLink = "'http://"+linkData+"' " + 'target="context"'
        break;
     case 2:
        fullLink = "'http://"+linkData+"' target=_blank"
        break;
     default:
        fullLink = "'http://"+linkData+"' " + 'target="context"'
        break;
  }
  linkItem = new Item(description, fullLink, gifName)
  return linkItem
}

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

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

indexOfEntries = new Array
nEntries = 0
doc = document
browserVersion = 0
selectedFolder=0

function initializeDocument()
{

  browserVersion = 0 //other
  if(doc.all) {
     browserVersion = 1
  } else {
     var ua = window.navigator.userAgent.toLowerCase();
     if(doc.layers) browserVersion = 2
     if (ua.indexOf('gecko') !=-1) browserVersion = 3
  }

  foldersTree.initialize(0, 1, "")

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

    if (browserVersion > 0) {
        indexOfEntries[0].mostra()
        clickOnNode(0)
        clickOnNode(0)
    }
  chkFolder();
}