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) {
		building_marvinsteven_over = newImage("images/building-marvinsteven_over.jpg");
		building_over = newImage("images/building-over.jpg");
		marvinsteven_over = newImage("images/marvinsteven-over.jpg");
		machines_over = newImage("images/machines-over.jpg");
		machines_marvinsteven_over = newImage("images/machines-marvinsteven_over.jpg");
		sorting_over = newImage("images/sorting-over.jpg");
		dresses_over = newImage("images/dresses-over.jpg");
		dresses_sorting_over = newImage("images/dresses-sorting_over.jpg");
		worker_over = newImage("images/worker-over.jpg");
		worker_dresses_over = newImage("images/worker-dresses_over.jpg");
		button1_over = newImage("images/button1-over.jpg");
		button2_over = newImage("images/button2-over.jpg");
		button3_over = newImage("images/button3-over.jpg");
		button4_over = newImage("images/button4-over.jpg");
		button5_over = newImage("images/button5-over.jpg");
		preloadFlag = true;
	}
}