title: Javascript fail to excute HTTP request
body: <p>I have the following code which fails when I try to execute it in my browser:</p>
  
  <pre><code>var req = new XMLHttpRequest();
  req.open('GET', "https://www.facebook.com/dialog/oauth?client_id=464891386855067&amp;redirect_uri=https://www.facebook.com/connect/login_success.html&amp;scope=basic_info,email,public_profile,user_about_me,user_activities,user_birthday,user_education_history,user_friends,user_interests,user_likes,user_location,user_photos,user_relationship_details&amp;response_type=token", false);
  req.send();
  var responseURL = req.responseURL;
  console.log(responseURL);
  </code></pre>
  
  <p>I get the following error: </p>
  
  <p>Uncaught NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load '<a href="https://www.facebook.com/dialog/oauth?client_id=464891386855067&amp;redirect_uri=https://www.facebook.com/connect/login_success.html&amp;scope=basic_info,email,public_profile,user_about_me,user_activities,user_birthday,user_education_history,user_friends,user_interests,user_likes,user_location,user_photos,user_relationship_details&amp;response_type=token" rel="nofollow">https://www.facebook.com/dialog/oauth?client_id=464891386855067&amp;redirect_uri=https://www.facebook.com/connect/login_success.html&amp;scope=basic_info,email,public_profile,user_about_me,user_activities,user_birthday,user_education_history,user_friends,user_interests,user_likes,user_location,user_photos,user_relationship_details&amp;response_type=token</a>'.</p>
  
  <p>Any ideas on what is going wrong here? I was pretty sure the code was gonna work.</p>