if (document.images) {

  abouton = new Image();
  abouton.src = "/images/nav_about_r.jpg";

  aboutoff = new Image();
  aboutoff.src = "/images/nav_about.jpg";

  serviceson = new Image();
  serviceson.src = "/images/nav_services_r.jpg";

  servicesoff = new Image();
  servicesoff.src = "/images/nav_services.jpg";

  classesprogramson = new Image();
  classesprogramson.src = "/images/nav_classes_r.jpg";

  classesprogramsoff = new Image();
  classesprogramsoff.src = "/images/nav_classes.jpg"

  aboutdoctorson = new Image();
  aboutdoctorson.src = "/images/nav_aboutdoctors_r.jpg";

  aboutdoctorsoff = new Image();
  aboutdoctorsoff.src = "/images/nav_aboutdoctors.jpg";

  programaffiliateson = new Image();
  programaffiliateson.src = "/images/nav_program_r.jpg";

  programaffiliatesoff = new Image();
  programaffiliatesoff.src = "/images/nav_program.jpg";

  girlsinmotionon = new Image();
  girlsinmotionon.src = "/images/nav_girlsinmotion_r.jpg";

  girlsinmotionoff = new Image();
  girlsinmotionoff.src = "/images/nav_girlsinmotion.jpg";

  speakerson = new Image();
  speakerson.src = "/images/nav_speakers_r.jpg";

  speakersoff = new Image();
  speakersoff.src = "/images/nav_speakers.jpg";
  
  directionson = new Image();
  directionson.src = "/images/nav_directions_r.jpg";

  directionsoff = new Image();
  directionsoff.src = "/images/nav_directions.jpg";
  
  contacton = new Image();
  contacton.src = "/images/nav_contact_r.jpg";

  contactoff = new Image();
  contactoff.src = "/images/nav_contact.jpg";
  
  }

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");
    }
  }
}