title: $.getJson callback function is not working
body: <p>I am calling a JSP by passing parameters which outputs a valid JSON as response, but still the <code>$.getJson</code> callback function is not getting fired.
    JSP page output is </p>
  
  <pre><code> { "data": [ [ [ 1258185480000,4.39], 
                 [ 1258186020000,4.31],
                 [ 1258184940000,4.39],
                 [ 1258183560000,4.39]  ] ] }
  </code></pre>
  
  <p>The URL points to the JSP page</p>
  
  <p>My <strong>jquery</strong> code is</p>
  
  <pre><code>&lt;script id="source" language="javascript" type="text/javascript"&gt;
  $(function () {   
    alert("before");
    $.getJson(URL,function(json){
              alert("hello");
            var plot = $.plot($("#placeholder"), json.data, options);
      });
  
   alert("after");
  });
  </code></pre>