function wsTreeCtrl()

{

	// Methods 

	this.initializeDocument	= initializeDocument;

	this.InsItem			= InsItem;

	this.GenerateCode		= GenerateCode;

	this.ToggleTree			= ToggleTree;

	this.ResetItem			= ResetItem;

	this.ExpandAllTree		= ExpandAllTree;

	this.RecudeAllTree		= RecudeAllTree;

	

	// constant 

	var nCount			= 0;

	var LastRootItem	= 0;

	var ImgDir			= "../images/Analysis/";

	var ItemImg			= "../images/Analysis/html.gif";

	

	// variable

	var Doc;

	var browserVersion;	

	var id		= "";

	var Item	= new Array();

	

	

	function initializeDocument() 

	{ 

		if (document.all) { //IE4

			Doc = document.all;

			browserVersion = 1;  

			

		}else if (document.layers) { //NS4 

			Doc = document.layers;

			browserVersion = 2; 



		}else if(document.getElementById) {	//NS6

			Doc = document;

			browserVersion = 3;		

			

		}else {	//other 

			Doc = document.all;

			browserVersion = 0; 

		}

	} 	

	

	function InsItem(parentItem, description, hreference, target)

	{

		var iDepth = 0;

		var iLength = Item.length;

		

		if(parentItem == null) {

			parentItem = iLength;

		}

		

		if(Item[parentItem] != null) {

			iDepth = Item[parentItem][4];

			iDepth++;

		}

		

		Item[iLength]		= new Array();

		Item[iLength][0]	= parentItem;

		Item[iLength][1]	= description;

		Item[iLength][2]	= hreference;

		Item[iLength][3]	= target;

		Item[iLength][4]	= iDepth;

		Item[iLength][5]	= true;

		

		nCount++;

		

		return iLength;		

	}

	

	function GenerateCode()

	{

		var NextItemDepth	= 0;

		var CurItemDepth	= 0;

		

		DocWrite("<table border='0' cellpadding='0' cellspacing='0' width=600>");



		for(var i=0; i<nCount; i++) {

			

			DocWrite("<tr id=wsTree_" + i + "><td>");

			

			DocWrite("<table border='0' cellpadding='0' cellspacing='0'><tr><td>");

			DocWrite(GetSpace(i, Item[i][4], false));

			DocWrite("</td><td>");



			DocWrite("<a href=\"javascript:ToggleTree('" + i + "','" + GetChildItems(i) + "')\" onfocus='this.blur()' >");

				

			var TempNodeImg;

			if(GetItemCount(i, Item[i][4]) == 1) { 

				if(Item.length == 1) { TempNodeImg = "r.gif"; }

				else { TempNodeImg = "L.gif"; }

			

			} else {

				if(i == 0) { TempNodeImg = "f.gif"; }

				else { TempNodeImg = "T.gif"; }

			}

			

				

			DocWrite("<img id=wsTreeNodeImg_" + i + " src='" + ImgDir + TempNodeImg + "' border='0'>");		

			DocWrite("</a>");



			DocWrite("</td><td>");

			DocWrite("<img id=wsTreeItemImg_" + i + " src='" + ImgDir + "html.gif" + "' border='0'>");

			DocWrite("</td><td>");

			DocWrite("&nbsp;");

			

			if(Item[i][2] != "" && Item[i][2] != null) {

				DocWrite("<a href='" + Item[i][2] + "'");



				if(Item[i][3] != "undefined" && Item[i][3] != null && Item[i][3] != "") {

					DocWrite(" target='" + Item[i][3] + "'");

				}

				DocWrite(">");

			}

			

			DocWrite(Item[i][1]);

			

			if(Item[i][2] != "" && Item[i][2] != null) {

				DocWrite("</a>");

			}



			DocWrite("</td></tr></table>");	

			DocWrite("</td></tr>");

		}

		DocWrite("</table>");

		

		LastRootItem = GetRootItem(nCount-1);

	}

	

	function GetSpace(CurItem, Depth, bBlank)

	{

		var Space = "";

		

		for(var i=0; i<Depth; i++) {

			if(bBlank == false) {

			//alert("CurItem==["+CurItem+"], Depth==["+i+"]");

				if(bHaveSameDepthChildItem(CurItem, i)) {

					Space += "<img src=" + ImgDir + "i.gif>";

				}else {

					Space += "<img src=" + ImgDir + "white.gif>";

				}

				

			}else {

				Space += "<img src=" + ImgDir + "white.gif>";

			}

		}

		

		//alert("Space===["+Space+"]");

		return Space;

	}

	

	function bHaveSameDepthChildItem(CurItem, Depth)

	{

		if(CurItem < 0 || CurItem > Item.length) { return false; }

	

		var PItem		= Item[CurItem][0];

		var RootItem	= GetRootItemEx(PItem, Depth);

		

		if(GetItemCount(RootItem, Depth) >= 2) {

			//alert("true");

			return true;

		}else {

			return false;

		}

	}

	

	function GetChildItems(iNode)

	{

		var ChildItems	= "";

		var CurDepth	= Item[iNode][4];

		

		for(var i=iNode+1; i<Item.length; i++) {



			if(CurDepth >= Item[i][4]) { return ChildItems; }

			

			if(Item[i][4] > Item[iNode][4]) {

				ChildItems += i + ";"

			}

		}



		return ChildItems;

	}

	

	function ToggleTree(CurNode, NodeItem)

	{

		if(NodeItem == "") { return; }

		

		var NodeStatus;

		var arr		= new Array();

		

		arr = NodeItem.split(";");

		

		if(Item[CurNode][5] == true) {

			ToggleDisplayLayer(arr, CurNode, "none");

			Item[CurNode][5] = false;

		}else {

			ToggleDisplayLayer(arr, CurNode, "");

			Item[CurNode][5] = true;

			ResetItem(CurNode);

		}

	}

	

	function ToggleDisplayLayer(ItemArray, CurNode, Display)

	{

		var NodeImg;

		var ItemImg;

		var bShow;

		

		if(Display == "none") { bShow = false; }

		else{ bShow = true; }



		if(!bShow) {

			ItemImg = ImgDir + "folder.gif";

			

			if(GetItemCount(CurNode,Item[CurNode][4]) == 1) {

				if(GetItemCount(GetRootItemEx(CurNode, 0),0) == 1 && CurNode == 0) {

					NodeImg = ImgDir + "Rplus.gif"; 

				}else {

					NodeImg = ImgDir + "Lplus.gif"; 

				}

				

			}else {

				if(CurNode == 0) {

					NodeImg = ImgDir + "fplus.gif"; 

				}else {

					NodeImg = ImgDir + "Tplus.gif"; 

				}

			}

			

		}

		else {

			ItemImg = ImgDir + "folderopen.gif";

			

			if(GetItemCount(CurNode,Item[CurNode][4]) == 1) {

				if(GetItemCount(GetRootItemEx(CurNode, 0),0) == 1 && CurNode == 0) {

					NodeImg = ImgDir + "Rminus.gif"; 

				}else {

					NodeImg = ImgDir + "Lminus.gif"; 

				}

				

			}else {

				if(CurNode == 0) {

					NodeImg = ImgDir + "fminus.gif"; 

				}else {		

					NodeImg = ImgDir + "Tminus.gif"; 

				}

			}

		}



		for(var i=0; i<ItemArray.length-1; i++) {

			SetTreeVisible(ItemArray[i], bShow);			

			SetImgVisible(CurNode, NodeImg, 1);

			SetImgVisible(CurNode, ItemImg, 2);		

		}

	}

	

	function ResetItem(iNode)

	{

		for(var i=iNode; i<Item.length; i++) {

	

			if(!Item[i][5]) {

				var arr = new Array();

				arr = GetChildItems(i).split(";");

				

				for(var j=0; j<arr.length-1; j++) {

					SetTreeVisible(arr[j], false);

				}

			}

		}	

	}

	

	function SetTreeVisible(iItem, bShow)

	{

		if(!bShow) {

			if(browserVersion == 1) {

				Doc["wsTree_" + iItem].style.display = "none";

				

			}else if(browserVersion == 3) {

				document.getElementById("wsTree_" + iItem).style.display = "none";

				

			}else {

				Doc["wsTree_" + iItem].visibility = "hiden";

			}

	

		}else {

			if(browserVersion == 1) {

				Doc["wsTree_" + iItem].style.display = "block";

				

			}else if(browserVersion == 3) {

				Doc.getElementById("wsTree_" + iItem).style.display = "";	

							

			}else {

				Doc["wsTree_" + iItem].visibility = "show";

			}				

		}

	}	

	

	function SetImgVisible(iItem, ImgName, iType)

	{

		var ItemName;

		switch(iType) {

			case 1:		ItemName = "wsTreeNodeImg_"; break;

			case 2:		ItemName = "wsTreeItemImg_"; break;

			default:	ItemName = "wsTreeItemImg_"; break;

		}



		if(browserVersion == 3) {

			Doc.getElementById(ItemName + iItem).src = ImgName;

			

		}else {

			Doc[ItemName + iItem].src = ImgName;

		}

	}	

	

	function ExpandAllTree()

	{

		for(var i=Item.length-1; i>=0; i--) {

			Item[i][5] = false;

			ToggleTree(i, GetChildItems(i));

		}

	}

	

	function RecudeAllTree()

	{

		for(var i=Item.length-1; i>=0; i--) {

			Item[i][5] = true;

			ToggleTree(i, GetChildItems(i));

		}

	}

	

	function GetRootItem(ChildItem)

	{

		if(Item[ChildItem][4] == 0) {

			return ChildItem;

		}else {

			return GetRootItem(Item[ChildItem][0]);

		}

	}

	

	function GetRootItemEx(ChildItem, Depth)

	{

		if(Item[ChildItem][4] == Depth) {

			return ChildItem;

		}else {

			return GetRootItemEx(Item[ChildItem][0], Depth);

		}

	}

	

	function GetItemCount(CurItem, Depth)

	{

		var nRet = 0;

		for(var i=CurItem; i<Item.length; i++) {

			if(Item[i][4] < Depth) break;

			

			if(Item[i][4] == Depth) {

		

				nRet++;

			}

		}

		

		return nRet;

	}



	function DocWrite(strHtml)

	{

		document.write(strHtml);

	}

}



function ToggleTree(CurNode, NodeItem)

{

	m_wsTreeCtrl.ToggleTree(CurNode, NodeItem);

}