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) {
		nav_about_over = newImage("/foundation/graphics/nav_about-over.gif");
		nav_school_over = newImage("/foundation/graphics/nav_school-over.gif");
		nav_internship_over = newImage("/foundation/graphics/nav_internship-over.gif");
		nav_sponsors_over = newImage("/foundation/graphics/nav_sponsors-over.gif");
		nav_auction_over = newImage("/foundation/graphics/nav_auction-over.gif");
		nav_reports_over = newImage("/foundation/graphics/nav_reports-over.gif");
		nav_specialevents_over = newImage("/foundation/graphics/nav_specialevents-over.gif");
		nav_outreach_over = newImage("/foundation/graphics/nav_outreach-over.gif");
		preloadFlag = true;
	}
}