function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    simon_firmenprofil_over = newImage("images/simon-gmbh_firmenprofil-over.gif");
    simon_partnerfirmen_over = newImage("images/simon-gmbh_partnerfirmen-over.gif");
    simon_kontakt_over = newImage("images/simon-gmbh_kontakt-over.gif");
    simon_ansichten_over = newImage("images/simon-gmbh_ansichten-over.gif");
    simon_allgemein_over = newImage("images/simon-gmbh_allgemein-over.gif");
    simon_heizung_over = newImage("images/simon-gmbh_heizung-over.gif");
    simon_sanitaer_over = newImage("images/simon-gmbh_sanitaer-over.gif");
    simon_lufttechnik_over = newImage("images/simon-gmbh_lufttechnik-over.gif");
    simon_energien_over = newImage("images/simon-gmbh_energien-over.gif");
    mouseover_firmenprofil_over = newImage("images/mouseover-firmenprofil_over.gif");
    mouseover_partnerfirmen_over = newImage("images/mouseover-partnerfirmen_over.gif");
    mouseover_kontakt_over = newImage("images/mouseover-kontakt_over.gif");
    mouseover_ansichten_over = newImage("images/mouseover-ansichten_over.gif");
    mouseover_allgemein_over = newImage("images/mouseover-allgemein_over.gif");
    mouseover_heizung_over = newImage("images/mouseover-heizung_over.gif");
    mouseover_sanitaer_over = newImage("images/mouseover-sanitaer_over.gif");
    mouseover_lufttechnik_over = newImage("images/mouseover-lufttechnik_over.gif");
    mouseover_energien_over = newImage("images/mouseover-energien_over.gif");
    impressum_over = newImage("images/simon-gmbh_impressum-over.gif");
    preloadFlag = true;
  }
}