function popup (HtmlFile, lang, width, height, left, top) {
  MyWindow = window.open("popup.php?sub=" + HtmlFile + "&lang=" + lang, "Info", "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + ",location=no, statusbar=no");
  MyWindow.statusbar.visible = false;
  MyWindow.focus();
}