if (document.images)
   {
     pic1on= new Image(70,22);
     pic1on.src="/img/find_on.jpg";  

     pic1off= new Image(70,22);
     pic1off.src="/img/find_off.jpg";
   }

function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }