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

var preloadFlag = false;
var about;
var calendar;
var faculty;
var undergrad;
var grad;
var resources;
var contact;
var home;

function preloadImages() {
	if (document.images) {
		about = newImage("images/nav/about_over.gif");
		calendar = newImage("images/nav/calendar_over.gif");
		faculty = newImage("images/nav/faculty_over.gif");
		undergrad = newImage("images/nav/undergrad_over.gif");
		grad = newImage("images/nav/grad_over.gif");
		resources = newImage("images/nav/resources_over.gif");
		contact = newImage("images/nav/contact_over.gif");
		home = newImage("images/nav/home_over.gif");
		preloadFlag = true;
	}
}


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];
		}
	}
}