// preload images for the primary navigation bar
var imghomeon = new Image();
var imghomeoff = new Image();
var imgbackgroundoff = new Image();
var imgbackgroundon = new Image();
var imgitineraryon = new Image();
var imgitineraryoff = new Image();
var imgticketson = new Image();
var imgticketsoff = new Image();
var imgcharitieson = new Image();
var imgcharitiesoff = new Image();
var imggalleryoff = new Image();
var imggalleryon = new Image();

imghomeon.src = '/images/rollovers/home_on.gif';
imghomeoff.src = '/images/rollovers/home_off.gif';
imgbackgroundon.src = '/images/rollovers/background_on.gif';
imgbackgroundoff.src = '/images/rollovers/background_off.gif';
imgitineraryon.src = '/images/rollovers/itinerary_on.gif';
imgitineraryoff.src = '/images/rollovers/itinerary_off.gif';
imgticketson.src = '/images/rollovers/tickets_on.gif';
imgticketsoff.src = '/images/rollovers/tickets_off.gif';
imgcharitieson.src = '/images/rollovers/charities_on.gif';
imgcharitiesoff.src = '/images/rollovers/charities_off.gif';
imggalleryon.src = '/images/rollovers/gallery_on.gif';
imggalleryoff.src = '/images/rollovers/gallery_off.gif';

function rollOver(whichOne, changeTo)
{
	if (document.images)
	{
		document[whichOne].src = eval(changeTo + ".src");
	}
}