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) {
		about_me_over = newImage("images/about_me-over.gif");
		photo_album_over = newImage("images/photo_album-over.gif");
		links_over = newImage("images/links-over.gif");
		other_over = newImage("images/other-over.gif");
		preloadFlag = true;
	}
}