function addEngine(name, ext)
{
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")) {
    window.sidebar.addSearchEngine(
      "http://mycroft.mozdev.org/external.php/" + name + ".src",
      "http://mycroft.mozdev.org/external.php/" + name + "."+ ext, "", "");
  } else {
    alert("You will need a browser which supports Sherlock to install this plugin.");
  }
}

function addOpenSearch(name,ext,meth)
{
  if ((typeof window.external == "object") && ((typeof window.external.AddSearchProvider == "unknown") || (typeof window.external.AddSearchProvider == "function"))) {
    if ((typeof window.external.AddSearchProvider == "unknown") && meth == "p") {
      alert("This plugin uses POST which is not currently supported by Internet Explorer's implementation of OpenSearch.");
    } else {
      window.external.AddSearchProvider(
        "http://mycroft.mozdev.org/externalos.php/" + name + ".xml");
    }
  } else {
    alert("You will need a browser which supports OpenSearch to install this plugin.");
  }
}