function popupC(url, nom, largeur, hauteur, options) {
 var coordY = ( screen.height - hauteur ) / 2;
 var coordX = ( screen.width - largeur ) / 2;
 window.open( url, nom, "top=" + coordY + ",left=" + coordX + ", width=" + largeur + ", height=" + hauteur + ", status=no, resizable=yes, location=no, directories=no, scrollbars=yes");
}