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) {
		xball = newImage("../imgs/ballorange.gif");
		xnavblank = newImage("../imgs/nav_blank.gif");
		xnews = newImage("../imgs/nav_news.gif");
		xdiary = newImage("../imgs/nav_diary.gif");
		xtour = newImage("../imgs/nav_tour.gif");
		xbio = newImage("../imgs/nav_bio.gif");
		xaudio = newImage("../imgs/nav_aud.gif");
		xvideo = newImage("../imgs/nav_vid.gif");
		xgallery = newImage("../imgs/nav_gall.gif");
		xdisc = newImage("../imgs/nav_disc.gif");
		xlink = newImage("../imgs/nav_links.gif");
		xcontact = newImage("../imgs/nav_contact.gif");
		xdecodable = newImage("../imgs/decodable_over.gif");
		preloadFlag = true;
	}
}