title: ajax jQuery: can't get JSON/xml from other domain
body: <pre><code>$(document).ready(function() {
      $.getJSON('http://192.168.99.68/test.json?callback=?', function(json) {    
          alert("abc");
      });
  });
  </code></pre>
  
  <p>It doesn't work.
  There is a JSON file on linux VM with 192.168.99.68.
   When I run <code>http://192.168.99.68/test.json?callback=?</code> on browser, it returns true JSON.</p>