title: undefined is returned when pasring JSON with jquery
body: <p>I have a backend script produce a json response, that I'm trying to parse via jquery. </p>
  
  <p>here is the reveals. </p>
  
  <pre><code>{"release": "Build version : 1.2.0.emt-4.1-1202", "timestamp": "52 Minutes"}
  </code></pre>
  
  <p>in the success portion of my ajax request, I'm trying to do the following. </p>
  
  <pre><code>success: function(result) {
   var json = JSON.parse(result);
       console.log(json); 
       console.log(json.timestamp); 
  }
  </code></pre>
  
  <p>console.log response. </p>
  
  <pre><code>Object {"release": "Build version : 4.2.0.emt-4.2-10502", "timestamp": "52 Minutes"}
  </code></pre>
  
  <p>and alert response </p>
  
  <pre><code>check:205 undefined
  </code></pre>
  
  <p>I'm not sure why it keeps showing as undefined, how can I parse it correctly? </p>