var message = "This photo is protected and the publication is exclusive for Fransen Hostas!\n\nIf you would like to publish this photo on your website, please contact Fransen Hostas (info@hostaparadise.com)";
function click(e) {
    if (document.all) {
        if (event.button == 2 || event.button == 3) {
            alert(message);
            return false;
        }
    }
    if (document.layers) {
        if (e.which == 3) {
            alert(message);
            return false;
        }
    }
}
if (document.layers) {
    document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown = click;