if (document.images){
nssa0 = new Image(); nssa0.src = "img/but1n.gif";
nssa1 = new Image(); nssa1.src = "img/but1o.gif";
nssb0 = new Image(); nssb0.src = "img/but2n.gif";
nssb1 = new Image(); nssb1.src = "img/but2o.gif";
nssc0 = new Image(); nssc0.src = "img/but3n.gif";
nssc1 = new Image(); nssc1.src = "img/but3o.gif";
nsse0 = new Image(); nsse0.src = "img/but5n.gif";
nsse1 = new Image(); nsse1.src = "img/but5o.gif";
nssf0 = new Image(); nssf0.src = "img/but6n.gif";
nssf1 = new Image(); nssf1.src = "img/but6o.gif";
nssg0 = new Image(); nssg0.src = "img/but7n.gif";
nssg1 = new Image(); nssg1.src = "img/but7o.gif";
}

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');}