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) {
		room = newImage("images/design/small-1.gif");
		drawingroom = newImage("images/design/small-3.gif");
		cookroom = newImage("images/design/small-2.gif");
		aisle = newImage("images/design/small-4.gif");
		
		
		preloadFlag = true;
	}
}
preloadImages();