function addMozillaPanel() {
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) {
    window.sidebar.addPanel ("Python Sidebar", "http://www.edgewall.org/python-sidebar/html/toc-tutorial.html","");
  } else {
    alert ("Sorry - you must be running Mozilla or Netscape to install this");
  }
}