var NN3 = false;

image1= new Image();
image1.src = "../../../graphics/backoff.gif";
image1on = new Image();
image1on.src = "../../../graphics/backon.gif";

image2= new Image();
image2.src = "../../../graphics/upoff.gif";
image2on = new Image();
image2on.src = "../../../graphics/upon.gif";

image3= new Image();
image3.src = "../../../graphics/downoff.gif";
image3on = new Image();
image3on.src = "../../../graphics/downon.gif";

image4= new Image();
image4.src = "../../../graphics/homeoff.gif";
image4on = new Image();
image4on.src = "../../../graphics/homeon.gif";

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);
}