// preloadimages 

	customisedhomeon =  new Image();
	customisedhomeon.src = "images/customisedhomeon.gif";
	customisedhomeoff = new Image();
	customisedhomeoff.src = "images/customisedhomeoff.gif";

	customisedabouton = new Image();
	customisedabouton.src = "images/customisedabouton.gif";						
	customisedaboutoff = new Image();
	customisedaboutoff.src = "images/customisedaboutoff.gif";

	customisedcontacton = new Image();
	customisedcontacton.src = "images/customisedcontacton.gif";	
	customisedcontactoff = new Image();
	customisedcontactoff.src = "images/customisedcontactoff.gif";

	customisedopticalon = new Image();
	customisedopticalon.src = "images/customisedopticalon.gif";						
	customisedopticaloff = new Image();
	customisedopticaloff.src = "images/customisedopticaloff.gif";

	customisedcustomisedon = new Image();
	customisedcustomisedon.src = "images/customisedcustomisedon.gif";	
	customisedcustomisedoff = new Image();
	customisedcustomisedoff.src = "images/customisedcustomisedoff.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 ['customisedhome'].src = customisedhomeon.src;
		else if (num=="2") document.images ['customisedhome'].src = customisedhomeoff.src;				
		else if (num=="3") document.images ['customisedabout'].src = customisedabouton.src;	
		else if (num=="4") document.images ['customisedabout'].src = customisedaboutoff.src;	
		else if (num=="5") document.images ['customisedcontact'].src = customisedcontacton.src;
		else if (num=="6") document.images ['customisedcontact'].src = customisedcontactoff.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 ['customisedoptical'].src = customisedopticalon.src;	
		else if (num=="14") document.images ['customisedoptical'].src = customisedopticaloff.src;	
		else if (num=="15") document.images ['customisedcustomised'].src = customisedcustomisedon.src;
		else if (num=="16") document.images ['customisedcustomised'].src = customisedcustomisedoff.src;
	}