function showSearchForm(onoff) {
    var img = document.getElementById("searchNavImage");
    var form = document.getElementById("searchForm");
    if (onoff) {
        img.style.display = "none";
        form.style.display = "";
        form.s.focus();
    } else {
        img.style.display = "";
        form.style.display = "none";
    }
}