title: get parent.location.url - iframe - from child to parent
body: <p>I got a page that is displayed within an iframe.</p>
  
  <p>I need to get the parent.location.url with js from that page (child page).</p>
  
  <p>Both sites are in different domains.</p>
  
  <p>I'm trying:</p>
  
  <p>alert(parent.location.url)</p>
  
  <p>But I get this error:</p>
  
  <p>Permission denied for <a href="http://parentdomain" rel="noreferrer">http://parentdomain</a> to get property Location.URL from <a href="http://childdomain" rel="noreferrer">http://childdomain</a>.</p>
  
  <p>???? Is it possible?</p>