if (document.images) {            // Active Images

            aktuelleson = new Image();
            aktuelleson.src = "/_img/aktuelles_1.gif";
            andereson = new Image();
            andereson.src = "/_img/anderes_1.gif";
            buecheron = new Image();
            buecheron.src = "/_img/buecher_1.gif";
            impressumon = new Image();
            impressumon.src = "/_img/impressum_1.gif";
            kontakton = new Image();
            kontakton.src = "/_img/kontakt_1.gif";
            linkson = new Image();
            linkson.src = "/_img/links_1.gif";
            vitaon = new Image();
            vitaon.src = "/_img/vita_1.gif";

            aktuellesoff = new Image();
            aktuellesoff.src = "/_img/aktuelles_0.gif";
            anderesoff = new Image();
            anderesoff.src = "/_img/anderes_0.gif";
            buecheroff = new Image();
            buecheroff.src = "/_img/buecher_0.gif";
            impressumoff = new Image();
            impressumoff.src = "/_img/impressum_0.gif";
            kontaktoff = new Image();
            kontaktoff.src = "/_img/kontakt_0.gif";
            linksoff = new Image();
            linksoff.src = "/_img/links_0.gif";
            vitaoff = new Image();
            vitaoff.src = "/_img/vita_0.gif";

        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}