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<!DOCTYPE html> <html> <body> <h3>A demonstration of how to access an IFRAME element</h3> <iframe id="myFrame" src="../default.html"></iframe> <p>Click the button to get the URL of the iframe.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myFrame").src; document.getElementById("demo").innerHTML = x; } </script> </body> </html>