if (document.images){
nssa0 = new Image(); nssa0.src = "img/but1n.jpg";
nssa1 = new Image(); nssa1.src = "img/but1o.jpg";
nssb0 = new Image(); nssb0.src = "img/but2n.jpg";
nssb1 = new Image(); nssb1.src = "img/but2o.jpg";
nssc0 = new Image(); nssc0.src = "img/but3n.jpg";
nssc1 = new Image(); nssc1.src = "img/but3o.jpg";
}

function nsc0(name)
{if (document.images)
document.images[name].src = eval(name + '0.src');
}function nsc1(name)
{if (document.images)
document.images[name].src = eval(name + '1.src');}