mao_off = new Image ( );
mao_off.src = "../img/studiobanner/mao.jpg";
mao_on = new Image ( );
mao_on.src = "../img/studiobanner/mao-select.jpg";

producer_off = new Image ( );
producer_off.src = "../img/studiobanner/producer.jpg";
producer_on = new Image ( );
producer_on.src = "../img/studiobanner/producer-select.jpg";

deejaying_off = new Image ( );
deejaying_off.src = "../img/studiobanner/deejaying.jpg";
deejaying_on = new Image ( );
deejaying_on.src = "../img/studiobanner/deejaying-select.jpg";

invisible_off = new Image ( );
invisible_off.src = "../img/studiobanner/invisible.jpg";
invisible_on = new Image ( );
invisible_on.src = "../img/studiobanner/invisible-select.jpg";

function button_on ( imgName )
{
    butOn = eval ( imgName + "_on.src" );
    document [imgName].src = butOn;
}

function button_off ( imgName )
  {
    butOff = eval ( imgName + "_off.src" );
    document [imgName].src = butOff;
}