function SwapImage(ImageName,ImageFile){
         Image1=new Image(119,39);
         Image1.src = ImageFile;
         document[ImageName].src = Image1.src;
         return true;
}

function anzeigen (id) {
        if(document.getElementById("untermenue"+id)) {
        	document.getElementById("untermenue"+id).style.visibility = "visible";
        }
}
function nichtanzeigen (id) {
        if(document.getElementById("untermenue"+id)) {
            document.getElementById("untermenue"+id).style.visibility = "hidden";
        }
}