var NN3 = false;
cb0f = new Image();	cb0f.src = "img/xb0f.gif";
cb0n = new Image();	cb0n.src = "img/xb0n.gif";
cb1f = new Image();	cb1f.src = "img/xb1f.gif";
cb1n = new Image();	cb1n.src = "img/xb1n.gif";
cb2f = new Image();	cb2f.src = "img/xb2f.gif";
cb2n = new Image();	cb2n.src = "img/xb2n.gif";
cb3f = new Image();	cb3f.src = "img/xb3f.gif";
cb3n = new Image();	cb3n.src = "img/xb3n.gif";
cb4f = new Image();	cb4f.src = "img/xb4f.gif";
cb4n = new Image();	cb4n.src = "img/xb4n.gif";
cb5f = new Image();	cb5f.src = "img/xb5f.gif";
cb5n = new Image();	cb5n.src = "img/xb5n.gif";

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

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