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  if (document.images)
   {
     pic1on= new Image(249,211);
     pic1on.src="./pictures/still_01_tn_off.jpg"; 

     pic2on= new Image(249,211);
     pic2on.src="./pictures/still_02_tn_off.jpg"; 
 
     pic3on= new Image(249,211);
     pic3on.src="./pictures/still_03_tn_off.jpg"; 
 
     pic4on= new Image(249,211);
     pic4on.src="./pictures/still_04_tn_off.jpg"; 
 
     pic5on= new Image(249,211);
     pic5on.src="./pictures/still_05_tn_off.jpg"; 
 
     pic6on= new Image(249,211);
     pic6on.src="./pictures/still_06_tn_off.jpg"; 
 
     pic7on= new Image(249,211);
     pic7on.src="./pictures/still_07_tn_off.jpg"; 
 
     pic8on= new Image(249,211);
     pic8on.src="./pictures/still_08_tn_off.jpg"; 
  

     pic1off= new Image(249,211);
     pic1off.src="./pictures/still_01_tn.jpg";

     pic2off= new Image(249,211);
     pic2off.src="./pictures/still_02_tn.jpg";

     pic3off= new Image(249,211);
     pic3off.src="./pictures/still_03_tn.jpg";

     pic4off= new Image(249,211);
     pic4off.src="./pictures/still_04_tn.jpg";

     pic5off= new Image(249,211);
     pic5off.src="./pictures/still_05_tn.jpg";

     pic6off= new Image(249,211);
     pic6off.src="./pictures/still_06_tn.jpg";

     pic7off= new Image(249,211);
     pic7off.src="./pictures/still_07_tn.jpg";

     pic8off= new Image(249,211);
     pic8off.src="./pictures/still_08_tn.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;
    }
 }

//-->