// preloadimages 

	indexon =  new Image();

	indexon.src = "images/homeon.gif";

	indexoff = new Image();

	indexoff.src = "images/homeoff.gif";			

	bookson = new Image();

	bookson.src = "images/bookson.gif";						

	booksoff = new Image();

	booksoff.src = "images/booksoff.gif";

	shortstorieson = new Image();

	shortstorieson.src = "images/shortstorieson.gif";	


	shortstoriesoff = new Image();

	shortstoriesoff.src = "images/shortstoriesoff.gif";	

	aboutisabelon = new Image();

	aboutisabelon.src = "images/tiffaboutisabelon.gif";	

	aboutisabeloff = new Image();

	aboutisabeloff.src = "images/tiffaboutisabeloff.gif";
	
	homeon = new Image();

	homeon.src = "images/toplefton.gif";	

	homeoff = new Image();

	homeoff.src = "images/topleftoff.gif";
	
	ukon = new Image();

	ukon.src = "images/ukeditionson.gif";	

	ukoff = new Image();

	ukoff.src = "images/ukeditionsoff.gif";
	
	uson = new Image();

	uson.src = "images/useditionson.gif";	

	usoff = new Image();

	usoff.src = "images/useditionsoff.gif";
	
	worldwideon = new Image();

	worldwideon.src = "images/worldwideeditionson.gif";	

	worldwideoff = new Image();

	worldwideoff.src = "images/worldwideeditionsoff.gif";

// initialise variables to hold browser properties

	var coll = "";

	var styleObj="";

// set up browser dependant object property access string

	if (parseInt(navigator.appVersion) >= 4){

		if (navigator.appName != "Netscape"){

			coll = "all.";

			styleObj = ".style";

			the_browser="IE";


			}

		}

// function to do rollovers on images

	function swapImage(num){

		if (num=="1") document.images ['index'].src = indexon.src;

		else if (num=="2") document.images ['index'].src = indexoff.src;				

		else if (num=="3") document.images ['books'].src = bookson.src;	

		else if (num=="4") document.images ['books'].src = booksoff.src;				

		else if (num=="5") document.images ['shortstories'].src = shortstorieson.src;	

		else if (num=="6") document.images ['shortstories'].src = shortstoriesoff.src;		

		else if (num=="7") document.images ['aboutisabel'].src = aboutisabelon.src;

		else if (num=="8") document.images ['aboutisabel'].src = aboutisabeloff.src;
		
		else if (num=="9") document.images ['home'].src = homeon.src;

		else if (num=="10") document.images ['home'].src = homeoff.src;	
		
		else if (num=="11") document.images ['uk'].src = ukon.src;

		else if (num=="12") document.images ['uk'].src = ukoff.src;	
		
		else if (num=="13") document.images ['us'].src = uson.src;

		else if (num=="14") document.images ['us'].src = usoff.src;	
		
		else if (num=="15") document.images ['worldwide'].src = worldwideon.src;

		else if (num=="16") document.images ['worldwide'].src = worldwideoff.src;								

		}