// preloadimages 

	traininghomeon =  new Image();
	traininghomeon.src = "images/traininghomeon.gif";
	traininghomeoff = new Image();
	traininghomeoff.src = "images/traininghomeoff.gif";

	trainingabouton = new Image();
	trainingabouton.src = "images/trainingabouton.gif";						
	trainingaboutoff = new Image();
	trainingaboutoff.src = "images/trainingaboutoff.gif";

	trainingcontacton = new Image();
	trainingcontacton.src = "images/trainingcontacton.gif";	
	trainingcontactoff = new Image();
	trainingcontactoff.src = "images/trainingcontactoff.gif";

	trainingreservationon = new Image();
	trainingreservationon.src = "images/trainingreservationon.gif";						
	trainingreservationoff = new Image();
	trainingreservationoff.src = "images/trainingreservationoff.gif";

	trainingonedayon = new Image();
	trainingonedayon.src = "images/trainingonedayon.gif";						
	trainingonedayoff = new Image();
	trainingonedayoff.src = "images/trainingonedayoff.gif";

	trainingcustomisedon = new Image();
	trainingcustomisedon.src = "images/trainingcustomisedon.gif";	
	trainingcustomisedoff = new Image();
	trainingcustomisedoff.src = "images/trainingcustomisedoff.gif";	

	opticalon = new Image();
	opticalon.src = "images/opticalon.gif";	
	opticaloff = new Image();
	opticaloff.src = "images/opticaloff.gif";	

	trainingon = new Image();
	trainingon.src = "images/trainingon.gif";	
	trainingoff = new Image();
	trainingoff.src = "images/trainingoff.gif";

	developmenton = new Image();
	developmenton.src = "images/developmenton.gif";	
	developmentoff = new Image();
	developmentoff.src = "images/developmentoff.gif";
	
	// function to do rollovers on images
	function swapImage(num){
		if (num=="1") document.images ['traininghome'].src = traininghomeon.src;
		else if (num=="2") document.images ['traininghome'].src = traininghomeoff.src;				
		else if (num=="3") document.images ['trainingabout'].src = trainingabouton.src;	
		else if (num=="4") document.images ['trainingabout'].src = trainingaboutoff.src;	
		else if (num=="5") document.images ['trainingcontact'].src = trainingcontacton.src;
		else if (num=="6") document.images ['trainingcontact'].src = trainingcontactoff.src;				
		else if (num=="7") document.images ['optical'].src = opticalon.src;	
		else if (num=="8") document.images ['optical'].src = opticaloff.src;		
		else if (num=="9") document.images ['training'].src = trainingon.src;
		else if (num=="10") document.images ['training'].src = trainingoff.src;
		else if (num=="11") document.images ['development'].src = developmenton.src;	
		else if (num=="12") document.images ['development'].src = developmentoff.src;
		else if (num=="13") document.images ['trainingoneday'].src = trainingonedayon.src;	
		else if (num=="14") document.images ['trainingoneday'].src = trainingonedayoff.src;	
		else if (num=="15") document.images ['trainingcustomised'].src = trainingcustomisedon.src;
		else if (num=="16") document.images ['trainingcustomised'].src = trainingcustomisedoff.src;	
		else if (num=="17") document.images ['trainingreservation'].src = trainingreservationon.src;
		else if (num=="18") document.images ['trainingreservation'].src = trainingreservationoff.src;
	}