function addTwitter() {
    var title = document.title.replace("","");
    var title2 = encodeURIComponent(title.substr(0, 50));
    var add_url = location.href;
    var url     = "http://twitter.com/home/?status=";
    var twiturl = url + title2 + ' ' + add_url;
    window.open(twiturl, "");
}