// JavaScript Document

if(document.images) {
london = new Image();
london.src = "london.jpg";
north = new Image();
north.src = "north.jpg";
north_west = new Image();
north_west.src = "north_west.jpg";
west = new Image();
west.src = "west.jpg";
central = new Image();
central.src = "central.jpg"; }

function change_NA_map(image_name) {
	if (document.images) { document.london.src = image_name; }
}
function reset_NA_map() {
	if (document.images) { document.london.src = "images/london.jpg"; }
}