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("nav/home-over.gif");
		santerians_over = newImage("nav/santerians-over.gif");
		about_over = newImage("nav/about-over.gif");
		curator_over = newImage("nav/curator-over.gif");
		preview_over = newImage("nav/preview-over.gif");
		press_over = newImage("nav/press-over.gif");
		events_over = newImage("nav/events-over.gif");
		preloadFlag = true;
	}
}