title: Scroll iframe parent
body: <p>How to get</p>
  <pre><code>$(window).scroll(function(){
    // window scroll
  });
  </code></pre>
  <p>in the parent window...</p>
  <p>I thought something like <code>window.parent.$(window)</code> or <code>$(window, document.parent)</code> or etc, but this not working</p>
  <p>I have an application in Google open social iframe and I want to get <code>scroll()</code> of main window.</p>