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) {
		flag_fr_over = newImage("images/flag_fr-over.jpg");
		flag_gb_over = newImage("images/flag_gb-over.jpg");
		flag_sp_over = newImage("images/flag_sp-over.jpg");
		flag_oz_over = newImage("images/flag_oz-over.jpg");
		flag_us_over = newImage("images/flag_us-over.jpg");
		preloadFlag = true;
	}
}