indexOfEntries = new Array 
nEntries = 0 
browser = 0 
selectedFolder=0
sTarget="principale"

iPath = "img/"
iBlank = iPath + "blank.gif"
iLeaf = iPath + "leaf.gif"
iLeafOK = iPath + "leafOk.gif"
iClose = iPath + "close.gif"
iOpen = iPath + "open.gif"
iLast = iPath + "last.gif"
iLastOpen = iPath + "lastopen.gif"
iLastClose = iPath + "lastclose.gif"
iCenterOpen = iPath + "centeropen.gif"
iCenter = iPath + "center.gif"
iCenterClose = iPath + "centerclose.gif"
iVertical = iPath + "vertical.gif"


function Folder(folderName, link)
{ 
  this.desc = folderName
  this.hreference = link
  this.id = -1   
  this.navObj = 0  
  this.iconImg = 0  
  this.nodeImg = 0  
  this.isLastNode = 0 
 
  this.isOpen = true 
  this.iconSrc = iOpen   
  this.children = new Array 
  this.nChildren = 0 
 
  this.initialize = initializeFolder 
  this.setState = setStateFolder 
  this.addChild = addChild 
  this.addLeaf = addLeaf
  this.createIndex = createEntryIndex 
  this.hide = hideFolder 
  this.display = display 
  this.renderOb = drawFolder 
  this.totalHeight = totalHeight 
  this.subEntries = folderSubEntries 
  this.outputLink = outputFolderLink 
} 
 
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 (browser > 0) 
    auxEv = "<a href='javascript:click("+this.id+")'>" 
  else 
    auxEv = "<a>" 
 
  if (level>0) 
    if (lastNode) //the last 'brother' in the children array 
    { 
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='" + iLastOpen + "' width=16 height=22 border=0></a>") 
      leftSide = leftSide + "<img src='" + iBlank + "' width=16 height=22>"  
      this.isLastNode = 1 
    } 
    else 
    { 
      this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='" + iCenterOpen + "' width=16 height=22 border=0></a>") 
      leftSide = leftSide + "<img src='" + iVertical + "' 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 (browser == 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 = iLastOpen 
      else 
	  folder.nodeImg.src = iCenterOpen 
    folder.iconImg.src = iOpen 
    for (i=0; i<folder.nChildren; i++) 
      folder.children[i].display() 
  } 
  else 
  { 
    if (folder.nodeImg) 
      if (folder.isLastNode) 
        folder.nodeImg.src = iLastClose 
      else 
	  folder.nodeImg.src = iCenterClose 
    folder.iconImg.src = iClose 
    for (i=0; i<folder.nChildren; i++) 
      folder.children[i].hide() 
  }  
} 
 
function hideFolder() 
{ 
  if (browser == 1) { 
    if (this.navObj.style.display == "none") 
      return 
    this.navObj.style.display = "none" 
  } else { 
    if (this.navObj.visibility == "hiden") 
      return 
    this.navObj.visibility = "hiden" 
  } 
   
  this.setState(0) 
} 
 
function drawFolder(leftSide) 
{ 
  if (browser == 2) { 
    if (!document.yPos) 
      document.yPos=8 
    document.write("<layer id='folder" + this.id + "' top=" + document.yPos + " visibility=hiden>") 
  } 
   
  document.write("<table ") 
  if (browser == 1) 
    document.write(" id='folder" + this.id + "' style='position:block;' ") 
  document.write(" border=0 cellspacing=0 cellpadding=0>") 
  document.write("<tr><td>") 
  document.write(leftSide) 
  this.outputLink() 
  document.write("<img name='folderIcon" + this.id + "' ") 
  document.write("src='" + this.iconSrc+"' border=0></a>") 
  document.write("</td><td valign=middle nowrap>") 
  this.outputLink() 
  document.write(this.desc + "</a>") 
  document.write("</td>")  
  document.write("</table>") 
   
  if (browser == 2) { 
    document.write("</layer>") 
  } 
 
  if (browser == 1) { 
    this.navObj = document.all["folder"+this.id] 
    this.iconImg = document.all["folderIcon"+this.id] 
    this.nodeImg = document.all["nodeIcon"+this.id] 
  } else if (browser == 2) { 
    this.navObj = document.layers["folder"+this.id] 
    this.iconImg = this.navObj.document.images["folderIcon"+this.id] 
    this.nodeImg = this.navObj.document.images["nodeIcon"+this.id] 
    document.yPos=document.yPos+this.navObj.clip.height 
  } 
} 
 
function outputFolderLink() 
{ 
  if (this.hreference) 
  { 
    document.write("<a href='" + this.hreference + "' TARGET=\"" + sTarget + "\" ") 
    if (browser > 0) 
      document.write("onClick='javascript:clickOnFolder("+this.id+")'") 
    document.write(">") 
  } 
  else 
    document.write("<a>") 
//  document.write("<a href='javascript:clickOnFolder("+this.id+")'>")   
} 
 
function addLeaf(childNode,icona) 
{ 
  this.children[this.nChildren] = childNode 
  this.children[this.nChildren].iconSrc = icona

  this.nChildren++ 
  return childNode 
} 

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)
      se = se + this.children[i].subEntries() 
  } 
 
  return se 
} 
 
function Item(itemDescription, itemLink)
{ 
  this.desc = itemDescription 
  this.link = itemLink 
  this.id = -1
  this.navObj = 0
  this.iconImg = 0
  this.iconSrc = iLeaf
 
  this.initialize = initializeItem 
  this.createIndex = createEntryIndex 
  this.hide = hideItem 
  this.display = display 
  this.renderOb = drawItem 
  this.totalHeight = totalHeight 
} 
 
function initializeItem(level, lastNode, leftSide) 
{  
  this.createIndex() 
 
  if (level>0) 
    if (lastNode)
    { 
      this.renderOb(leftSide + "<img src='" + iLast + "' width=16 height=22>") 
      leftSide = leftSide + "<img src='" + iBlank + "' width=16 height=22>"  
    } 
    else 
    { 
      this.renderOb(leftSide + "<img src='" + iCenter + "' width=16 height=22>") 
      leftSide = leftSide + "<img src='" + iVertical + "' width=16 height=22>" 
    } 
  else 
    this.renderOb("")   
} 

function hideItem() 
{ 
  if (browser == 1) { 
    if (this.navObj.style.display == "none") 
      return 
    this.navObj.style.display = "none" 
  } else { 
    if (this.navObj.visibility == "hiden") 
      return 
    this.navObj.visibility = "hiden" 
  }     
} 
 
 
function drawItem(leftSide) 
{ 
  if (browser == 2) 
    document.write("<layer id='item" + this.id + "' top=" + document.yPos + " visibility=hiden>") 
     
  document.write("<table ") 
  if (browser == 1) 
    document.write(" id='item" + this.id + "' style='position:block;' ") 
  document.write(" border=0 cellspacing=0 cellpadding=0>") 
  document.write("<tr><td>") 
  document.write(leftSide) 
  document.write("<a href=" + this.link + ">") 
  document.write("<img id='itemIcon"+this.id+"' ") 
  document.write("src='"+this.iconSrc+"' border=0>") 
  document.write("</a>") 
  document.write("</td><td valign=middle nowrap>") 
  document.write("<a href=" + this.link + ">" + this.desc + "</a>") 
  document.write("</table>") 
   
  if (browser == 2) 
    document.write("</layer>") 
 
  if (browser == 1) { 
    this.navObj = document.all["item"+this.id] 
    this.iconImg = document.all["itemIcon"+this.id] 
  } else if (browser == 2) { 
    this.navObj = document.layers["item"+this.id] 
    this.iconImg = this.navObj.document.images["itemIcon"+this.id] 
    document.yPos=document.yPos+this.navObj.clip.height 
  } 
} 
 
 
function display() 
{ 
  if (browser == 1) 
    this.navObj.style.display = "block" 
  else 
    this.navObj.visibility = "show" 
} 
 
function createEntryIndex() 
{ 
  this.id = nEntries 
  indexOfEntries[nEntries] = this 
  nEntries++ 
} 
 
// total height of subEntries open 
function totalHeight() //used with browser == 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] 
 
  if (!clicked.isOpen) 
    click(folderId) 
 
  return  
 
  if (clicked.isSelected) 
    return 
} 
 
function click(folderId) 
{ 
  var clickedFolder = 0 
  var state = 0 
 
  clickedFolder = indexOfEntries[folderId] 
  state = clickedFolder.isOpen 
 
  clickedFolder.setState(!state) //open<->close  
} 

function openAll() 
{ 
  var clickedFolder = 0 
  var state = 0 
 
  for (i=0;i<nEntries;i++) {
	if (indexOfEntries[i].nChildren) {
		// non è una foglia
		clickedFolder = indexOfEntries[i];
  		state = clickedFolder.isOpen;
		if (!state)
  			clickedFolder.setState(!state); //open<->close
	}
  }
} 

function initializeDocument(open,foldersTree) 
{ 
  if (document.all) 
    browser = 1 //IE4   
  else 
    if (document.layers) 
      browser = 2 //NS4 
    else 
      browser = 0 //other 
 
  foldersTree.initialize(0, 1, "") 
  foldersTree.display()
  
  if (browser > 0) 
  { 
    document.write("<layer top="+indexOfEntries[nEntries-1].navObj.top+">&nbsp;</layer>") 
 
    // close the whole tree 
    click(0) 
    // open the root folder 
    click(0) 
  } 
  
  if (open == 1)
	openAll();
} 
 
function gFld(description, hreference) 
{ 
  folder = new Folder(description, hreference) 
  return folder 
} 
 
function gLnk(target, description, linkData) 
{ 
  fullLink = "" 
 
  if (target==0) // pagina locale nel target
  { 
    fullLink = "'"+linkData+"' " 
  } 
  else 
  { 
    if (target==1) //pagina remota in nuova finestra
       fullLink = "'http://"+linkData+"' target=_blank" 
    else //pagina remota nel target
       fullLink = "'http://"+linkData+"' target=\"" + sTarget + "\"" 
  } 
 
  linkItem = new Item(description, fullLink)   
  return linkItem 
} 
 

function insDoc(parentFolder, document, icona) 
{ 
  parentFolder.addLeaf(document,icona) 
} 
 

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