var posY = screen.height/2 - 144;
var posX = screen.width/2 - 288;
// fonction simple, seul le fichier à afficher est passé en variable
function popup(url) {
window.open(url,'nom_de_la_fenetre','location=no,toolbar=no,directories=no,menubar=no,resizable=no,scrollbars=yes,status=no,width=576,height=288,screenY='+posY+',screenX='+posX);
}

function popup2(url) {
window.open(url,'nom_de_la_fenetre','location=no,toolbar=no,directories=no,menubar=no,resizable=no,scrollbars=no,status=no,width=576,height=288,screenY='+posY+',screenX='+posX);
}
function popupmaking_of(url) {
window.open(url,'nom_de_la_fenetre','location=no,toolbar=no,directories=no,menubar=no,resizable=no,scrollbars=yes,status=no,width=594,height=288,screenY='+posY+',screenX='+posX);
}