title: get iframe query string with javaScript
body: <p>I have an iframe. When the page loads, the page makes a queryString.</p>
  
  <p>I need to access the query string that is generated after the page is loaded</p>
  
  <p>But with this code just I can access the src without the query string</p>
  
  <pre><code>alert(document.getElementById('myframe').src);
  </code></pre>