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) {
		undergrad_02_over = newImage("Images_F/undergrad_02-over.jpg");
		undergrad_04_over = newImage("Images_F/undergrad_04-over.jpg");
		undergrad_06_over = newImage("Images_F/undergrad_06-over.jpg");
		undergrad_08_over = newImage("Images_F/undergrad_08-over.jpg");
		undergrad_10_over = newImage("iImages_F/undergrad_10-over.jpg");
		undergrad_12_over = newImage("Images_F/undergrad_12-over.jpg");
		undergrad_14_over = newImage("Images_F/undergrad_14-over.jpg");
		undergrad_16_over = newImage("Images_F/undergrad_16-over.jpg");

		preloadFlag = true;
	}
}