if (document.images) {
  image1off = new Image();
  image1off.src = "../images/btn1.jpg";
  image2off = new Image();
  image2off.src = "../images/btn2.jpg";
  image3off = new Image();
  image3off.src = "../images/btn3.jpg";
  image4off = new Image();
  image4off.src = "../images/btn4.jpg";
  image5off = new Image();
  image5off.src = "../images/btn5.jpg";
  image6off = new Image();
  image6off.src = "../images/btn6.jpg";
  image7off = new Image();
  image7off.src = "../images/btn7.jpg";
  image8off = new Image();
  image8off.src = "../images/btn8.jpg";
  image1on = new Image();
  image1on.src = "../images/btn1s.jpg";
  image2on = new Image();
  image2on.src = "../images/btn2s.jpg";
  image3on = new Image();
  image3on.src = "../images/btn3s.jpg";
  image4on = new Image();
  image4on.src = "../images/btn4s.jpg";
  image5on = new Image();
  image5on.src = "../images/btn5s.jpg";
  image6on = new Image();
  image6on.src = "../images/btn6s.jpg";
  image7on = new Image();
  image7on.src = "../images/btn7s.jpg";
  image8on = new Image();
  image8on.src = "../images/btn8s.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");
    }
  }
}

if (document.images) {
  img1aoff = new Image();
  img1aoff.src = "../images/nav1.png";
  img2aoff = new Image();
  img2aoff.src = "../images/nav2.png";
  img3aoff = new Image();
  img3aoff.src = "../images/nav3.png";
  img4aoff = new Image();
  img4aoff.src = "../images/nav4.png";
  img1aon = new Image();
  img1aon.src = "../images/nav1s.png";
  img2aon = new Image();
  img2aon.src = "../images/nav2s.png";
  img3aon = new Image();
  img3aon.src = "../images/nav3s.png";
  img4aon = new Image();
  img4aon.src = "../images/nav4s.png";
}

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


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