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copied!<p>The solution jQuery came up with, is to provide an anonymous callback function like this:</p> <pre><code>jQuery.getJSON("http://mycrossdomain.com/?callback=?", function(data) { // Now I have the data }); </code></pre> <p>I think this could be adapted to your case as well.</p> <pre><code>var data = new DataRetriever(); data.GetData(function(data) { // Now I have the data }); </code></pre> <p>You could do the same thing behind the scenes in the GetData function if you didn't want to provide an anonymous function.</p> <pre><code>function GetData(callback) { // optional // Create random function name however you want var funcName = "data_" + (+new Date() + Math.floor(Math.random()*100)), // Moved this up to be available in the random function new_tag = document.createElement('script'); // This part will allow you to do the callback behind the scenes if callback isn't provided as a param callback = callback || function(data) { this.dataReturned = data; // or something } // Assign it to the window object window[funcName] = function(data) { callback(data); // Unassign this function delete window[funcName]; // Recycle the script tag document.body.removeChild(new_tag); } new_tag.type = 'text/javascript'; new_tag.src = 'http://somesite.com/somemethod?callback='+funcName; // Add the element document.body.appendChild(new_tag); } </code></pre> <p>Note you will have to make sure the JSONP request accepts the callback GET parameter. If you're using a 3rd party API they will already support this. Hope this helps!</p>

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