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) {
		whatsnew_on = newImage("/images/whatsnew_on.gif");
		calendar_on = newImage("/images/calendar_on.gif");
		perform_on = newImage("/images/perform_on.gif");
		films_on = newImage("/images/films_on.gif");
		lectures_on = newImage("/images/lectures_on.gif");
		free_on = newImage("/images/free_on.gif");
		who_on = newImage("/images/who_on.gif");
		tickets_on = newImage("/images/tickets_on.gif");
		outreach_on = newImage("/images/outreach_on.gif");
		join_on = newImage("/images/join_on.gif");
		commissions_on = newImage("/images/commissions_on.gif");
		campusmap_on = newImage("/images/campusmap_on.gif");
		pastevents_on = newImage("/images/pastevents_on.gif");
		jobs_on = newImage("/images/jobs_on.gif");
		links_on = newImage("/images/links_on.gif");
		maillist_on = newImage("/images/maillist.gif");
		preloadFlag = true;
  }
}