function addEngine() {
    if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")) {
        window.sidebar.addSearchEngine(
        "http://kolibka.com/ffse/kolibka.src",
        "http://kolibka.com/ffse/kolibka.png",
        "Kolibka",
        "Knowledge" );
    } else {
        alert("Newer version of Mozilla/Firefox is required to add a search engine.");
    }
}