function share2facebook() {
    var url = 'http://www.facebook.com/sharer.php?';
    //alert("doc title=" + document.title);
    url = url + 'u=' + document.location + '&t=' + document.title;
    document.location = url;
    return true;
}


function share2twitter() {
    var url = "http://twitthis.com/twit?url=" + document.location;
    document.location=url;
    return true;
}