title: Parse data inside script tag which loaded a certain script
body: <p>Sometimes you see code like this. </p>
  
  <pre><code>&lt;script type="text/javascript" src="https://apis.google.com/js/plusone.js"&gt;
        {lang:'en', parsetags:'explicit'}
  &lt;/script&gt;
  </code></pre>
  
  <p>I'd like to know how it's possible to parse the object literal inside this script tag from the loaded script. </p>