if (document.images) {
  image1off = new Image();
  image1off.src = "images/btn1.gif";
  image2off = new Image();
  image2off.src = "images/btn2.gif";
  image3off = new Image();
  image3off.src = "images/btn3.gif";
  image4off = new Image();
  image4off.src = "images/btn4.gif";
  image5off = new Image();
  image5off.src = "images/btn5.gif";
  image6off = new Image();
  image6off.src = "images/btn6.gif";
  image7off = new Image();
  image7off.src = "images/btn7.gif";
  image8off = new Image();
  image8off.src = "images/btn8.gif";
  image9off = new Image();
  image9off.src = "images/btn9.gif";
  image1on = new Image();
  image1on.src = "images/btn1s.gif";
  image2on = new Image();
  image2on.src = "images/btn2s.gif";
  image3on = new Image();
  image3on.src = "images/btn3s.gif";
  image4on = new Image();
  image4on.src = "images/btn4s.gif";
  image5on = new Image();
  image5on.src = "images/btn5s.gif";
  image6on = new Image();
  image6on.src = "images/btn6s.gif";
  image7on = new Image();
  image7on.src = "images/btn7s.gif";
  image8on = new Image();
  image8on.src = "images/btn8s.gif";
  image9on = new Image();
  image9on.src = "images/btn9s.gif";
}



function changeImages() {


  image1off.src = "images/btn1.gif";
  image1on.src = "images/btn1s.gif";



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


function calcHeight()
{
  //find the height of the internal page
  var the_height=document.getElementById('FRAME1').contentWindow.document.body.scrollHeight + 100;

  if (the_height<400){the_height = 2000;}

  //change the height of the iframe
  document.getElementById('FRAME1').height=the_height;

}