acoustique_off = new Image ( );
acoustique_off.src = "../img/instrumbanner/acoustique.jpg";
acoustique_on = new Image ( );
acoustique_on.src = "../img/instrumbanner/acoustique-select.jpg";

electrique_off = new Image ( );
electrique_off.src = "../img/instrumbanner/electrique.jpg";
electrique_on = new Image ( );
electrique_on.src = "../img/instrumbanner/electrique-select.jpg";

basse_off = new Image ( );
basse_off.src = "../img/instrumbanner/basse.jpg";
basse_on = new Image ( );
basse_on.src = "../img/instrumbanner/basse-select.jpg";

batterie_off = new Image ( );
batterie_off.src = "../img/instrumbanner/batterie.jpg";
batterie_on = new Image ( );
batterie_on.src = "../img/instrumbanner/batterie-select.jpg";

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