title: AS3 ExternaInterface: Call a javascript function in a pop-up window invoked by Flash
body: <p>In Flash, I have invoked a pop-up window using</p>
  
  <pre><code>ExternalInterface.call("window.open","http://www.mypage.com,"win","height=640,width=480,toolbar=no,scrollbars=yes");
  </code></pre>
  
  <p>In the invoked pop-up, there is a javascript function I want to access. If the javascript were in the same page as the movie, I could use</p>
  
  <pre><code>ExternalInterface.call("jsFunction", "value")
  </code></pre>
  
  <p>Since it's not, how can I access the javascript functions in the pop-up window?</p>