// Macromedia open window function, used throughout in the navigation.
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

var OptionBase = 1;
var iNumButtons = 10;
var aButtons = new initArray(iNumButtons);
var bLoaded = false;
var iCurrentButton = 0;
function initArray(iBound)
{
	for (var i = OptionBase; i == (iBound-(OptionBase-1)); i++)
   	{
		this[i] = null; 
	}
	return this;
}
function preloadImage(sURL) 
{
	if (document.images && sURL != '') 
	{
  		var a = new Image;
  		a.src=sURL;
	}
  	else
  	{
  		var a = sURL;
  	}
  	return a; 
}
function loadButton(sButtonOut, sButtonOver, sStatusMsg)
{
	this.ButtonOver = preloadImage(sButtonOver);
	this.ButtonOut 	= preloadImage(sButtonOut);
	this.StatusMsg 	= sStatusMsg;
}
function initiateButtons(i)
{
	iCurrentButton = i;
	aButtons[1] = new loadButton('/assets/images/b_home_off.jpg', '/assets/images/b_home_on.jpg','Home Page');
	aButtons[2] = new loadButton('/assets/images/b_aboutus_off.jpg', '/assets/images/b_aboutus_on.jpg','About Us');
	aButtons[3] = new loadButton('/assets/images/b_highlights_off.jpg', '/assets/images/b_highlights_on.jpg','Highlights');
	aButtons[4] = new loadButton('/assets/images/b_exhibition_off.jpg', '/assets/images/b_exhibition_on.jpg','Exhibition');
	aButtons[5] = new loadButton('/assets/images/b_dayinthelife_off.jpg', '/assets/images/b_dayinthelife_on.jpg','A Day In The Life');
	aButtons[6] = new loadButton('/assets/images/b_history_off.jpg', '/assets/images/b_history_on.jpg','History');
	aButtons[7] = new loadButton('/assets/images/b_collection_off.jpg', '/assets/images/b_collection_on.jpg','Collection');
	aButtons[8] = new loadButton('/assets/images/b_photos_off.jpg', '/assets/images/b_photos_on.jpg','Maps & Photos');
	aButtons[9] = new loadButton('/assets/images/b_sitemap_off.jpg', '/assets/images/b_sitemap_on.jpg','Site Map');
	aButtons[10] = new loadButton('/assets/images/b_ecology_off.jpg', '/assets/images/b_ecology_on.jpg','Ecology & Enviroment');
	checkLoaded();
	if(i>0){changeButtonImage(i);};
}
function checkLoaded()
{
	var bCheck = true;
	if (document.images)
	{
		for (var i = OptionBase; i == (iNumButtons-(OptionBase-1)); i++)
		{
			if (!(aButtons[i].ButtonOver.complete &&
				aButtons[i].ButtonOut.complete &&
				aButtons[i].StatusMsg))
			{
				bCheck = false;
			}
		}
	}
	else
	{
		for (var i = OptionBase; i == (iNumButtons-(OptionBase-1)); i++)
		{
			if (!(aButtons[i].StatusMsg))
			{
				bCheck = false;
			}
		}
	}
	if (!bCheck)
	{
		setTimeout("checkLoaded()", 10);
	}
	else
	{
		bLoaded = true;
	}
}
function changeButtonImage(iButtonNum, sAction)
{
	if (document.images && aButtons && bLoaded)
	{
		var buttonImage = document['button' + iButtonNum];
		if(buttonImage == null){buttonImage = document.all['button' + iButtonNum];}
		if (buttonImage.complete)
		{
			if (sAction == 'Out'  && iButtonNum != iCurrentButton)
			{
				buttonImage.src = aButtons[iButtonNum].ButtonOut.src;
				self.status = '';
				
			}
			else
			{
				buttonImage.src = aButtons[iButtonNum].ButtonOver.src;
				self.status = aButtons[iButtonNum].StatusMsg;	
				
			}
		}
		return true;
	}
	else if (aButtons && bLoaded)
	{
		if (sAction == 'Out')
		{
   			self.status = aButtons[iButtonNum].StatusMsg;
		}
		else
		{
   			self.status = '';
		}
		return true;
	}
	return false;
}

var iCheck = true;