if (document.images) {
/*  image1on = new Image();
  image1on.src = "images/surgical_on.gif";
  image1off = new Image();
  image1off.src = "images/surgical_off.gif";
*/
  image1on = new Image();
  image1on.src = "images/surgstaff_on.gif";
  image1off = new Image();
  image1off.src = "images/surgstaff_off.gif";

  image2on = new Image();
  image2on.src = "images/location_on.gif";
  image2off = new Image();
  image2off.src = "images/location_off.gif";
  image3on = new Image();
  image3on.src = "images/insurances_on.gif";
  image3off = new Image();
  image3off.src = "images/insurances_off.gif";
  image4on = new Image();
  image4on.src = "images/preparing_on.gif";
  image4off = new Image();
  image4off.src = "images/preparing_off.gif";
  image5on = new Image();
  image5on.src = "images/preregistration_on.gif";
  image5off = new Image();
  image5off.src = "images/preregistration_off.gif";
  image6on = new Image();
  image6on.src = "images/login_on.gif";
  image6off = new Image();
  image6off.src = "images/login_off.gif";
  image7on = new Image();
  image7on.src = "images/contact_on.gif";
  image7off = new Image();
  image7off.src = "images/contact_off.gif";
  image8on = new Image();
  image8on.src = "images/home_on.gif";
  image8off = new Image();
  image8off.src = "images/home_off.gif";
}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'on.src');
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'off.src');
  }
}