//rollovers (P.S.)
//function imgSwap(obj,pic) {
	//document[obj].src = pic;
//}

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) {
		HOME_over = newImage("/images/nav/HOME-over.gif");
		DIRECTORY_over = newImage("/images/nav/DIRECTORY-over.gif");
		AtoZ_over = newImage("/images/nav/AtoZ-over.gif");
		CONTACTUS_over = newImage("/images/nav/CONTACTUS-over.gif");
		Amherst_over = newImage("/images/nav/Amherst-over.jpg");
		boston_over = newImage("/images/nav/boston-over.jpg");
		umassdartmouth_over = newImage("/images/nav/umassdartmouth-over.jpg");
		umasslowell_over = newImage("/images/nav/umasslowell-over.jpg");
		umassmedical_over = newImage("/images/nav/umassmedical-over.jpg");
		umassonline_over = newImage("/images/nav/umassonline-over.gif");
		preloadFlag = true;
	}
}