function bookmarkPage() {
    if (window.sidebar)
        window.sidebar.addPanel(document.title, document.location.href, '');
    else if (window.external)
        window.external.AddFavorite(location.href, document.title);
    else if (window.opera) {
        var element = document.createElement('A');
        element.setAttribute('href', document.location.href);
        element.setAttribute('title', document.title);
        element.setAttribute('rel', 'sidebar');
        element.click();
    }
}

function toggleDisplay(id) {
    var element = document.getElementById(id);
    if (element != null)
        element.style.display = (element.style.display == 'none') ? 'block' : 'none';
}