AddToFavorites

function AddToFavorites()
{
    var title = document.title; var url = location.href;
    if (window.sidebar) // Firefox
        window.sidebar.addPanel(title, url, '');
    else if(window.opera && window.print) // Opera
    {
        var elem = document.createElement('a');
        elem.setAttribute('href',url);
        elem.setAttribute('title',title);
        elem.setAttribute('rel','sidebar'); // required to work in opera 7+
        elem.click();
    }
    else if(document.all) // IE
        window.external.AddFavorite(url, title);
}