var monpopup;

function newwin(zeurl,zeoptions) {
  if (monpopup) {
    monpopup.close();
  }
  monpopup = window.open(zeurl, 'popup', zeoptions);
  if (monpopup) {
    monpopup.focus();
  }
}

function newwin2(zeurl,largeur,hauteur) {
  if (monpopup) {
    monpopup.close();
  }
  largeur = largeur +20;
  hauteur = hauteur +25;
  zeoptions = 'resizable=yes,width='+largeur+',height='+hauteur;
  monpopup = window.open(zeurl, 'popup', zeoptions);
  if (monpopup) {
    monpopup.focus();
  }
}

function checkpopup() {
  if (monpopup) {
    monpopup.close();
  }
}

window.onunload = checkpopup;