var NN3 = false;
link = new Image();
link.src = "images/slices_02.jpg";
linkon = new Image();
linkon.src = "images/sliceson_02.jpg";
link1 = new Image();
link1.src = "images/slices_03.jpg";
link1on = new Image();
link1on.src = "images/sliceson_03.jpg";
link2 = new Image();
link2.src = "images/slices_04.jpg";
link2on = new Image();
link2on.src = "images/sliceson_04.jpg";
link3 = new Image();
link3.src = "images/slices_05.jpg";
link3on = new Image();
link3on.src = "images/sliceson_05.jpg";
link4 = new Image();
link4.src = "images/slices_06.jpg";
link4on = new Image();
link4on.src = "images/sliceson_06.jpg";
link5 = new Image();
link5.src = "images/slices_07.jpg";
link5on = new Image();
link5on.src = "images/sliceson_07.jpg";
link6 = new Image();
link6.src = "images/slices_08.jpg";
link6on = new Image();
link6on.src = "images/sliceson_08.jpg";

function on3(name)   {
        document[name].src = eval(name + "on.src");
}
function off3(name)  {
        document[name].src = eval(name + ".src");
}
NN3 = true;

function on(name)  {
        if (NN3) on3(name);
}
function off(name)  {
        if (NN3) off3(name);
}