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];
		}
	}
}

function preloadImages() {
	if (document.images) {
		home_over = newImage("images/home.gif");
		aboutus_over = newImage("images/about.gif");
		curriculum_over = newImage("images/curr.gif");
		schedule_over = newImage("images/sched.gif");
		forum_over = newImage("images/forum.gif");
		gallery_over = newImage("images/gallery.gif");
		webcam_over = newImage("images/webcam-over.gif");
		preloadFlag = true;
	}
}

var preloadFlag = false;
window.onload = preloadImages();