function bookmarkSite(bookmarkurl) 
{
    if (document.all) 
    {
        window.external.AddFavorite('http://www.' + bookmarkurl,bookmarkurl);
    }
    else if (window.sidebar && window.sidebar.addPanel) 
    {
        window.sidebar.addPanel(bookmarkurl,'http://www.' + bookmarkurl,"");
    }
}