// (c) 2001 Niels Heidenreich

bl = new Image (21, 21);
bl.src = "img/robl.gif";
sp = new Image (21, 21);
sp.src = "img/rosp.gif";

function ci (ro, idx) {
	this.document.images[idx + 10].src = (ro ? bl.src : sp.src);
}