Facebook Logintester

HTML

<div id="facebook_test">log</div>

JavaScript

function set_test(name, status) {
    var el = document.getElementById(name + '_test');
    el.innerHTML = status ? 'Ja, Du bist eingeloggt.' : 'Nein, nicht eingeloggt.';
    el.style.color = status ? '#0a0' : '#a00';
    el.style.fontWeight = 'bold';
}

(function() {
      var test = document.createElement('script');
      test.type = "text/javascript";
      test.src  = 'https://www.facebook.com/imike3';
      test.onload = function(){set_test('facebook', 1)};
      test.onerror = function(){set_test('facebook', 0)};
      var s = document.getElementsByTagName('script')[0];
      s.parentNode.insertBefore(test,s);
})();