title: Using Twitter REST API in JSON Format with AJAX
body: <p>I'm trying to do AJAX on Twitter REST API (JSON Format). I did the below thing, But, nothing happens. </p>
  
  <p>Not getting any response from server (Twitter). Did I miss something?</p>
  
  <pre><code>function getRecentTweet(){
  
          twitterUsername = document.getElementById("twitterUsername").value;
  
          if(window.XMLHttpRequest){
              xhr = new XMLHttpRequest();
          }
          else{
              xhr = new ActiveXObject("Microsoft.XMLHTTP");
          }
  
          xhr.open("GET", "http://api.twitter.com/1/statuses/user_timeline/" + twitterUsername + ".json", true);
          xhr.send(null);
  
          xhr.onreadystatechange = function(){
              if (xhr.readyState == 4) {
                  if(xhr.status == 200) {
                      var jsonObj = eval(responseJSON);
                      document.getElementById("twitterStream").innerHTML = jsonObj[0].text;
                  }
              }
          } 
      }
  </code></pre>
  
  <p>Thanks!</p>