function popup(nom,url) 
{
  w = 1032;
  h = 896;
  wleft = (screen.width - w) / 2;
  wtop = (screen.height - h) / 2;
  
  if (wleft < 0) {
    wleft = 0;
  }
  if (wtop < 0) {
    wtop = 0;
  }
  window.name=nom;
  finestra=window.open(url,'_blank','menubar=no,toolbar=no,scrollbar=no,width=1000,height=768,resizable=yes,scrollbars=yes,status=yes');
  opener=self;
  finestra.moveTo(wleft,wtop);  
}