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) {
		members_over = newImage("images/members-over.gif");
		students_over = newImage("images/students-over.gif");
		prospects_over = newImage("images/prospects-over.gif");
		employers_over = newImage("images/employers-over.gif");
		news_over = newImage("images/news-over.gif");
		mission_members_over = newImage("images/mission-members_over.gif");
		mission_students_over = newImage("images/mission-students_over.gif");
		mission_prospects_over = newImage("images/mission-prospects_over.gif");
		mission_employers_over = newImage("images/mission-employers_over.gif");
		contact_over = newImage("images/contact-over.gif");
		preloadFlag = true;
	}
}