if (document.images)
   {
     pic1on= new Image(123,29);
     pic1on.src="images/m01.jpg";  
	 pic2on= new Image(84,29);
     pic2on.src="images/m02.jpg";  
	 pic3on= new Image(93,29);
     pic3on.src="images/m03.jpg";  
	 pic4on= new Image(94,29);
     pic4on.src="images/m04.jpg";  
	 pic5on= new Image(93,29);
     pic5on.src="images/m05.jpg";  	   
	 pic6on= new Image(115,29);
     pic6on.src="images/m06.jpg";  
	 

     pic1off= new Image(123,29);
     pic1off.src="images/m1.jpg";
     pic2off= new Image(84,29);
     pic2off.src="images/m2.jpg";
     pic3off= new Image(93,29);
     pic3off.src="images/m3.jpg";
     pic4off= new Image(94,29);
     pic4off.src="images/m4.jpg";
     pic5off= new Image(93,29);
     pic5off.src="images/m5.jpg";
     pic6off= new Image(115,29);
     pic6off.src="images/m6.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;
    }
 }