function ouvrir_pop(nom,scroll,l,h,url) 
{
hauteur=Math.round((screen.availHeight-h)/2);
largeur=Math.round((screen.availWidth-l)/2)-13;
window.open(url, nom, "toolbar=0,location=0,directories=0,status=0, scrollbars="+scroll+",resizable=0,menubar=0,top="+hauteur+",left="+largeur+",width="+l+",height="+h);
}

function ferme()
{
  window.close();
}