title: XMLHttpRequest cannot load. Origin is not allowed by Access-Control-Allow-Origin
body: <p>Im using this code to call json file, i checked it with jslint "Results : Valid JSON", it is correct, I used it few months, but today suddenly stopped working, the console shows this. </p>
  
  <p>XMLHttpRequest cannot load <a href="http://www.weburl.com/web/calc/filethree.js" rel="nofollow">http://www.weburl.com/web/calc/filethree.js</a>. Origin <a href="http://www.weburl.com/" rel="nofollow">http://www.weburl.com/</a> is not allowed by Access-Control-Allow-Origin.</p>
  
  <pre><code>$.getJSON("http://www.weburl.com/web/calc/filethree.js",function(datathree){
          $.each(datathree, function(i,value){
          // do something
          });
          }
  );
  </code></pre>
  
  <p>Im newbie in jquery, I searched some info, tried callback= , but nothing .. :/</p>
  
  <p>With callback I get 404 error</p>
  
  <pre><code>http://www.weburl.com/web/calc/filethree.js&amp;callback=jQuery180014668452506884933_1349693824272?_=1349693824434
  </code></pre>
  
  <p>I dont know what happened It worked prefectly yesterday :/</p>