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) {
	eventsover = newImage("/images/buttoneventsglow.gif");
	findbooksover = newImage("/images/buttonfindbooksglow.gif");
	gamesover = newImage("/images/buttongamesglow.gif");
	homeworknycover = newImage("/images/buttonhomeworknycglow.gif");
	staffpicksover = newImage("/images/buttonstaffpicksglow.gif");
	summerreadingover = newImage("/images/buttonsummerreadingglow.gif");
	tumblebooksover = newImage("/images/buttontumblebooksglow.gif");
	whatsnewover = newImage("/images/buttonwhatsnewglow.gif");
	preloadFlag = true;
	}
}

// Email encoder
function em_conf(userAgent) {
	uName = userAgent;
	prefix1 = "mail";
	prefix2 = "to:";
	midSection = "@";
	suffix1 = "nypl";
	suffix2 = ".org";

	document.location.href = prefix1 + prefix2 + uName + midSection + suffix1 + suffix2;
}