if (document.images)
   {

     pic2on= new Image(200,70);
     pic2on.src="pic/02a.jpg";  
     pic2off= new Image(200,70);
     pic2off.src="pic/02.jpg";

     pic3on= new Image(200,70);
     pic3on.src="pic/03a.jpg";  
     pic3off= new Image(200,70);
     pic3off.src="pic/03.jpg";

     pic4on= new Image(200,70);
     pic4on.src="pic/04a.jpg";  
     pic4off= new Image(200,70);
     pic4off.src="pic/04.jpg";

     pic5on= new Image(200,70);
     pic5on.src="pic/05a.jpg";  
     pic5off= new Image(200,70);
     pic5off.src="pic/05.jpg";

	 pic6on= new Image(200,70);
     pic6on.src="pic/06a.jpg";  
     pic6off= new Image(200,70);
     pic6off.src="pic/06.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;
    }
 }