title: Get Text from iframe
body: <p>I have the following HTML</p>
  
  <pre><code>&lt;iframe id ="myIframe"&gt;
       #document
           &lt;head&gt;...&lt;/head&gt;
          &lt;body&gt;Text I want to get is here&lt;/body&gt;
  &lt;/iframe&gt;
  </code></pre>
  
  <p>I only know the iframe's id. Using JavaScript, how can I extract the text from the body?</p>