avantage_off = new Image ( );
avantage_off.src = "../img/ecolebanner/avantage.jpg";
avantage_on = new Image ( );
avantage_on.src = "../img/ecolebanner/avantage-select.jpg";

philosophie_off = new Image ( );
philosophie_off.src = "../img/ecolebanner/philosophie.jpg";
philosophie_on = new Image ( );
philosophie_on.src = "../img/ecolebanner/philosophie-select.jpg";

fonctionnement_off = new Image ( );
fonctionnement_off.src = "../img/ecolebanner/fonctionnement.jpg";
fonctionnement_on = new Image ( );
fonctionnement_on.src = "../img/ecolebanner/fonctionnement-select.jpg";

interface_off = new Image ( );
interface_off.src = "../img/ecolebanner/interface.jpg";
interface_on = new Image ( );
interface_on.src = "../img/ecolebanner/interface-select.jpg";

avis_off = new Image ( );
avis_off.src = "../img/ecolebanner/avis.jpg";
avis_on = new Image ( );
avis_on.src = "../img/ecolebanner/avis-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;
}