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");
		home_down = newImage("nav/home_down.gif");
		works_over = newImage("nav/works_over.gif");
		works_down = newImage("nav/works_down.gif");
		pixel_over = newImage("nav/pixel_over.gif");
		pixel_down = newImage("nav/pixel_down.gif");
		links_over = newImage("nav/links_over.gif");
		links_down = newImage("nav/links_down.gif");
		email_over = newImage("nav/email_over.gif");
		email_down = newImage("nav/email_down.gif");
		preloadFlag = true;
	}
}