function apri(url,name,options)
{
  browserVer = parseInt(navigator.appVersion);
  browserName = navigator.appName;
  if (browserName == "Netscape")
  { if (browserVer >= 3) version = "n3";
    else version = "n2";
  }
  else
  { if (browserVer > 4) version = "n3";
    else version = "n2";
  }
  finestra=window.open(url,name,options);
  if (version == "n3") finestra.focus();
}