<!--
if (document.images) {
img1on = new Image();
img1on.src = "/images/tx2.jpg";
img2on = new Image();
img2on.src = "/images/tx1.jpg";
img1off = new Image();
img1off.src = "/images/tx1.jpg";
img2off = new Image();
img2off.src = "/images/tx2.jpg";
}
function imgOn(imgName) {
  if (document.images) {
     document[imgName].src = eval(imgName + "on.src");
  }
}
function imgOff(imgName) {
  if (document.images) {
     document[imgName].src = eval(imgName + "off.src");
  }
}
//-->