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) {
		button = newImage("images/button.gif");
		button_over = newImage("images/button-over.gif");
		button_down = newImage("images/button-down.gif");
		sidebar = newImage("images/sidebar.jpg");
		texas = newImage("images/texas.gif");
		spacer = newImage("images/spacer.gf");
		preloadFlag = true;
	}
}