function installSearchEngine() {
	 if (window.external && ("AddSearchProvider" in window.external)) {
	   // Firefox 2 and IE 7, OpenSearch
	   window.external.AddSearchProvider("http://www.freedictionary.org/firefox_freedict.xml");
	 } else if (window.sidebar && ("addSearchEngine" in window.sidebar)) {
	   // No search engine support (IE 6, Opera, etc).
	   alert("Sorry, we do not support this browser version");
	   // Firefox <= 1.5, Sherlock
	//   window.sidebar.addSearchEngine("http://example.com/search-plugin.src",
	//                                  "http://example.com/search-icon.png",
	//                                  "Search Plugin", "");
	 } else {
	   // No search engine support (IE 6, Opera, etc).
	   alert("Sorry, we do not support this browser version");
	 }
}