function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		NorthWest_01_eastmidlands_over = newImage("/images/maps/region/northwest/NorthWest_01-eastmidlands_o.gif");
		NorthWest_01_yorkshireandhumberside_over = newImage("/images/maps/region/northwest/NorthWest_01-yorkshireandhu.gif");
		NorthWest_01_north_over = newImage("/images/maps/region/northwest/NorthWest_01-north_over.gif");
		NorthWest_01_lancashire_over = newImage("/images/maps/region/northwest/NorthWest_01-lancashire_ove.gif");
		NorthWest_01_mersey_over = newImage("/images/maps/region/northwest/NorthWest_01-mersey_over.gif");
		NorthWest_01_greatermanchester_over = newImage("/images/maps/region/northwest/NorthWest_01-greatermanches.gif");
		NorthWest_01_cheshire_over = newImage("/images/maps/region/northwest/NorthWest_01-cheshire_over.gif");
		NorthWest_01_wales_over = newImage("/images/maps/region/northwest/NorthWest_01-wales_over.gif");
		NorthWest_01_westmidlands_over = newImage("/images/maps/region/northwest/NorthWest_01-westmidlands_o.gif");
		preloadFlag = true;
	}
}