// Don't change these parameters
var delay        = 500;
var menuElement  = new Array ();
var usedWidth    = 0;
var numOfMenus   = 0;
/// ----------------------------

// check browser version
isNC    = (document.layers) ? 1 : 0;
isOPERA = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
isIE    = (document.all && !isOPERA)? true : false;
isDOM   = (document.getElementById && !isIE && !isOPERA)? true : false;

var topID  = -1;

// constructor of menu elements
function menuConstructor (id, content)
{
	this.ID            = id;
	this.parentID      = content [0]*1;
	this.parentItemID  = content [1]*1;
	this.width         = content [2]*1;
	this.timerID       = -1;
	this.isOn          = false;
	this.item          = new Array ();
	this.currItemID    = -1;
	
	this.x = content [3]*1;
	
	if (this.x < 0 && this.parentID == -1)
	{
		this.x = initX + usedWidth;
		usedWidth = usedWidth + this.width;
	}
	else if (this.x < 0 && this.parentID > -1)
	{
		this.x =  menuElement [this.parentID].x + menuElement [this.parentID].width - xOverlap;
	}
	
	this.y = content [4]*1;
	if (this.y < 0 && this.parentID == -1)
		this.y = initY;
	else if (this.y < 0 && this.parentID > -1)
		this.y =  menuElement [this.parentID].y + itemHeight*this.parentItemID + yOverlap;
	
	items = content [5];

	layerBody = '<table cellpadding="0" cellspacing="' + borderSize + '" border="0" width="225"><tr><td height="3" bgcolor="#666666" colspan="3"></td></tr>';
	
	szamol=0;
	for (j = 0; j <= items.length - 2; j = j + 2)
	{
		if(szamol!=0)
			{
			layerBody += '<tr><td width="10" height="1" bgcolor="#666666"></td><td width="210" height="1" bgcolor="#ffffff"></td><td width="5" height="1" bgcolor="#666666"></td></tr>';
			}
		controlBlock = ' onMouseOver = "enterItem (' + this.ID + ', ' + ((j + 2)/2 - 1) + ');" onMouseOut = "exitItem (' + this.ID + ', ' + ((j + 2)/2 - 1) + ');" ';
		layerBody += '<tr><td width="10" bgcolor="#666666">&nbsp;</td><td height="' + itemHeight + '" id="td_' + id + '_' + j + '" bgcolor="#666666" width="210" align="left" valign="middle"><a href='+ items [j + 1] +' ' + controlBlock + ' class="al_menu_style" title="' + items [j] + '">' + items [j] + '</a></td><td width="5" bgcolor="#666666">&nbsp;</td></tr>';
		layerBody = layerBody + '\n';
		szamol++;
	}

	if (!isNC)
		layerHeader = '<div id=Menu' + this.ID + ' onMouseOver="enterMenu (' + this.ID + ');" onMouseOut = "exitMenu (' + this.ID + ');"' + ' style="z-index: 10; visibility: hidden; position: absolute; left: ' + this.x + '; top: ' + this.y + ';">';
	else
		layerHeader = '<layer id=Menu' + this.ID + ' onMouseOver="enterMenu (' + this.ID + ');" onMouseOut = "exitMenu (' + this.ID + ');"' + ' visibility=hide left=' + this.x + ' top =' + this.y + '>';

	layerHeader += '<table cellpadding=0 cellspacing=0 border=0><tr><td>';

	layerFooter = '<tr><td height=1 bgcolor=#666666 colspan=3></td></tr></table></td></tr></table>';

	if (!isNC)
		layerFooter = layerFooter + '</div>';
	else
		layerFooter = layerFooter + '</layer>';
	document.writeln (layerHeader + layerBody + layerFooter);

//	alert(layerHeader + layerBody + layerFooter);

	return this;
}
function enterTopItem (ID)
{
	if (topID != ID && topID != -1)
		hideTree (topID);
	releaseTree (ID);
	topID = ID;
	show (ID);
}
function exitTopItem (ID)
{
	menuElement [ID].timerID = setTimeout ('hide (' + ID + ')', delay);
}
function enterItem (menuID, itemID)
{
	var currItemID = menuElement [menuID].currItemID;

	if (currItemID != i & currItemID > -1)	
		hide (currItemID);
	

	for (var i = 0; i < numOfMenus; i++)
	{
		if (menuElement [i].parentID == menuID &&
		    menuElement [i].parentItemID == itemID)
		{
			clearTimeout (menuElement [i].timerID);
			menuElement [i].timerID = -1;
			show (i);
			return 0;
		}
	}

	return -1;
}
function exitItem (menuID, itemID)
{
	for (var i = 0; i < numOfMenus; i++)
	{
		if (menuElement [i].parentID == menuID && menuElement [i].parentItemID == itemID)
		{
			menuElement [i].timerID = setTimeout ('hide (' + i + ')', delay);
			return 0;
		}
	}
}
function enterMenu (ID)
{
	var parentID = menuElement [ID].parentID;
	if (parentID == -1)
	{
		clearTimeout (menuElement [ID].timerID);
		menuElement [ID].timerID = -1;
	}
	else
		releaseTree (ID);
}
function exitMenu (ID)
{
	timeoutTree (ID);
}
function hideTree (ID)
{
	hide (ID);
	for (var j = 0; j < numOfMenus; j++)
	{
		if (menuElement [j].parentID == ID &&
			menuElement [j].isOn)
		{
			hideTree (j);
			return 0;
		}
	}
}
function releaseTree (ID)
{
	clearTimeout (menuElement [ID].timerID);
	menuElement [ID].timerID = -1;

	var parentID = menuElement [ID].parentID;
	if (parentID > -1)
		releaseTree (parentID);
}
function timeoutTree (ID)
{
	menuElement [ID].timerID = setTimeout ('hide (' + ID + ')', delay);
	var parentID = menuElement [ID].parentID;
	if (parentID > -1)
		timeoutTree (parentID);
}

function show (ID)
{
	if (isDOM) 
		document.getElementById('Menu' + ID).style.visibility = "visible";
    	else if (isIE) 
		document.all['Menu' + ID].style.visibility = "visible";
      	else if (isNC) 
		document.layers[ID].visibility = "show";		
	menuElement [ID].isOn = true;

	if (menuElement [ID].parentID > -1)
		menuElement [menuElement [ID].parentID].currItemID = ID;
}

function hide (ID)
{
	if (isDOM) 
		document.getElementById('Menu' + ID).style.visibility = "hidden";
    	else if (isIE) 
		document.all['Menu' + ID].style.visibility = "hidden";
      	else if (isNC) 
		document.layers[ID].visibility = "hide";

	menuElement [ID].isOn = false;

	if (menuElement [ID].parentID > -1)
		menuElement [menuElement [ID].parentID].currItemID = -1;
}

function createMenuTree ()
{
	for (var i = 0; i < menuContent.length; i++)
	{
		menuElement [i] = new menuConstructor (i, menuContent [i]);
		numOfMenus++;
	}
}