var NN3 = false;
img = new Array
image0 = new Image();
image0.src = "images/alea_intro01.jpg";
image0on = new Image();
image0on.src = "images/alea_intro02.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);
}