willkommenon = new Image();
willkommenon.src = "pics/nav/willkommen_h.gif";
willkommenoff = new Image();
willkommenoff.src = "pics/nav/willkommen.gif";
interneton = new Image();
interneton.src = "pics/nav/internet_h.gif";
internetoff = new Image();
internetoff.src = "pics/nav/internet.gif";
netzwerkeon = new Image();
netzwerkeon.src = "pics/nav/netzwerke_h.gif";
netzwerkeoff = new Image();
netzwerkeoff.src = "pics/nav/netzwerke.gif";
webdesignon = new Image();
webdesignon.src = "pics/nav/webdesign_h.gif";
webdesignoff = new Image();
webdesignoff.src = "pics/nav/webdesign.gif";
softwareon = new Image();
softwareon.src = "pics/nav/software_h.gif";
softwareoff = new Image();
softwareoff.src = "pics/nav/software.gif";
kontakton = new Image();
kontakton.src = "pics/nav/kontakt_h.gif";
kontaktoff = new Image();
kontaktoff.src = "pics/nav/kontakt.gif";

function rollon(imgName) {
        imgOn = eval(imgName + "on.src");
        document[imgName].src = imgOn;
}

function rolloff(imgName) {
        document[imgName].src = eval(imgName + "off.src");
}