if (document.images)
   {

// COLORS-ON
         
     pic50on= new Image(20,22);
     pic50on.src="./images/01A.gif";  
     pic51on= new Image(20,22);
     pic51on.src="./images/02A.gif"; 
     pic52on= new Image(20,22);
     pic52on.src="./images/03A.gif"; 
     pic53on= new Image(20,22);
     pic53on.src="./images/04A.gif"; 
     pic54on= new Image(20,22);
     pic54on.src="./images/05A.gif"; 
     pic55on= new Image(20,22);
     pic55on.src="./images/06A.gif"; 
     pic56on= new Image(20,22);
     pic56on.src="./images/07A.gif"; 
     pic57on= new Image(20,22);
     pic57on.src="./images/08A.gif"; 
     
// COLORS-OFF
         
     pic50off= new Image(20,22);
     pic50off.src="./images/01.gif";
     pic51off= new Image(20,22);
     pic51off.src="./images/02.gif"; 
     pic52off= new Image(20,22);
     pic52off.src="./images/03.gif"; 
     pic53off= new Image(20,22);
     pic53off.src="./images/04.gif"; 
     pic54off= new Image(20,22);
     pic54off.src="./images/05.gif"; 
     pic55off= new Image(20,22);
     pic55off.src="./images/06.gif"; 
     pic56off= new Image(20,22);
     pic56off.src="./images/07.gif"; 
     pic57off= new Image(20,22);
     pic57off.src="./images/08.gif"; 
     
   }

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

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