<!--


function on(imgName)
 {
   if (document.images)
    {
      imgOn="images/" + imgName + "_on.gif";
      document[imgName].src = imgOn;
    }
 }

function off(imgName)
 {
   if (document.images)
    {
      imgOff="images/" + imgName + "_off.gif";
      document[imgName].src = imgOff;
    }
 }


//-->