// preloadimages 

	contacthomeon =  new Image();
	contacthomeon.src = "images/contacthomeon.gif";
	contacthomeoff = new Image();
	contacthomeoff.src = "images/contacthomeoff.gif";

	contactabouton = new Image();
	contactabouton.src = "images/contactabouton.gif";						
	contactaboutoff = new Image();
	contactaboutoff.src = "images/contactaboutoff.gif";

	contactcontacton = new Image();
	contactcontacton.src = "images/contactcontacton.gif";	
	contactcontactoff = new Image();
	contactcontactoff.src = "images/contactcontactoff.gif";

	contactopticalon = new Image();
	contactopticalon.src = "images/contactopticalon.gif";						
	contactopticaloff = new Image();
	contactopticaloff.src = "images/contactopticaloff.gif";

	contactcontacton = new Image();
	contactcontacton.src = "images/contactcontacton.gif";	
	contactcontactoff = new Image();
	contactcontactoff.src = "images/contactcontactoff.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 ['contacthome'].src = contacthomeon.src;
		else if (num=="2") document.images ['contacthome'].src = contacthomeoff.src;				
		else if (num=="3") document.images ['contactabout'].src = contactabouton.src;	
		else if (num=="4") document.images ['contactabout'].src = contactaboutoff.src;	
		else if (num=="5") document.images ['contactcontact'].src = contactcontacton.src;
		else if (num=="6") document.images ['contactcontact'].src = contactcontactoff.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 ['contactoptical'].src = contactopticalon.src;	
		else if (num=="14") document.images ['contactoptical'].src = contactopticaloff.src;	
		else if (num=="15") document.images ['contactcontact'].src = contactcontacton.src;
		else if (num=="16") document.images ['contactcontact'].src = contactcontactoff.src;
	}