if (document.images)
{
	link1on= new Image();	link1on.src="images/box1ON.jpg";	link1off= new Image();	link1off.src="images/box1.jpg";
	link2on= new Image();	link2on.src="images/box2ON.jpg";	link2off= new Image();	link2off.src="images/box2.jpg";
	link3on= new Image();	link3on.src="images/box3ON.jpg";	link3off= new Image();	link3off.src="images/box3.jpg";
	link4on= new Image();	link4on.src="images/box4ON.jpg";	link4off= new Image();	link4off.src="images/box4.jpg";
	link5on= new Image();	link5on.src="images/box5ON.jpg";	link5off= new Image();	link5off.src="images/box5.jpg";
}

function turnon(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;
    }
 }