For security reasons, you can’t directly reach the page outside the iframe from inside it. However, we can retrieve information from the browser.
To retrieve the parent’s address, i.e. the URL of the page where the iframe is added, just write this:
<script type="text/javascript"> var url (window.location!) - window.parent.location)? document.referrer: document.location; alert (url); </script>
This doesn’t work if your iframe is itself in another iframe.