if (document.images) {
  image1on = new Image();
  image1on.src="images/butt_untern_over.gif";
  image1off = new Image();
  image1off.src="images/butt_untern.gif";

  image2on = new Image();
  image2on.src="images/butt_dienstl_over.gif";
  image2off = new Image();
  image2off.src="images/butt_dienstl.gif";

  image3on = new Image();
  image3on.src="images/butt_haus_over.gif";
  image3off = new Image();
  image3off.src="images/butt_haus.gif";
  
  image4on = new Image();
  image4on.src="images/butt_ref_over.gif";
  image4off = new Image();
  image4off.src="images/butt_ref.gif";
  
  image5on = new Image();
  image5on.src="images/butt_home_over.gif";
  image5off = new Image();
  image5off.src="images/butt_home.gif";
  
  image6on = new Image();
  image6on.src="images/butt_verleih_over.gif";
  image6off = new Image();
  image6off.src="images/butt_verleih.gif";
  
  image7on = new Image();
  image7on.src="images/butt_fleck_over.gif";
  image7off = new Image();
  image7off.src="images/butt_fleck.gif";
  
  image8on = new Image();
  image8on.src="images/butt_jobs_over.gif";
  image8off = new Image();
  image8off.src="images/butt_jobs.gif";
  
  image9on = new Image();
  image9on.src="images/butt_hausm_over.gif";
  image9off = new Image();
  image9off.src="images/butt_hausm.gif";


}

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