function swapClass(id,type){
    if (type == "over"){
        document.getElementById(id).className = "menu_niveau2_hover";
    } else if (type == "out"){
        document.getElementById(id).className = "menu_niveau2";
    }
}

function swapClassOnglet(id,type){
    if (type == "over"){
        document.getElementById(id).className = "onglet_over";
    } else if (type == "out"){
        document.getElementById(id).className = "onglet_out";
    }
}