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) {
		home_over = newImage("images/mn-home-btn-ovr.gif");
		about_over = newImage("images/mn-about-btn-ovr.gif");
		workshops_over = newImage("images/mn-workshops-btn-ovr.gif");
		client_over = newImage("images/mn-client-btn-ovr.gif");
		books_over = newImage("images/mn-books-btn-ovr.gif");
		teach_over = newImage("images/mn-teach-btn-ovr.gif");
		parent_over = newImage("images/mn-parent-btn-ovr.gif");
		contact_over = newImage("images/mn-contact-btn-ovr.gif");
		preloadFlag = true;
	}
}