title: getting json from external source in javascript
body: <p>Json issues with javascript and jquery.
  Trying to load some JSON using javascript.</p>
  
  <p>I have it working using:</p>
  
  <p>See it here: <a href="http://jsfiddle.net/5pjha/789/" rel="nofollow">http://jsfiddle.net/5pjha/789/</a></p>
  
  <pre><code>var url = "http://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&amp;sensor=true";
  
  $.getJSON(url, function (json) {
      alert(JSON.stringify(json.results));
  });
  </code></pre>
  
  <p>But it dosnt work on the following urls, why is this?</p>
  
  <p><a href="https://poloniex.com/public?command=return24hVolume" rel="nofollow">https://poloniex.com/public?command=return24hVolume</a> </p>
  
  <p><a href="https://bittrex.com/api/v1/public/getmarkets" rel="nofollow">https://bittrex.com/api/v1/public/getmarkets</a></p>
  
  <p><a href="https://api.mintpal.com/v1/market/summary/" rel="nofollow">https://api.mintpal.com/v1/market/summary/</a></p>
  
  <p>Are the following urls not correct JSON ?</p>
  
  <p>Thanks</p>