var BrowserName = navigator.appName;
var BrowserVers = parseInt(navigator.appVersion);

ok = document.images;
if (ok) { on = new Image(); on.src = "/images/bestellen-x.gif"; off = new Image(); off.src = "/images/bestellen.gif"; }
function an(n) { if (ok) {document[n].src = eval("on.src");}}
function aus(n) { if (ok) {document[n].src = eval("off.src");}}