Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<iframe id="myframe" src="demo_iframe2.html" width="100%" height="500" style="background:#f1f1f1;">
  <p>Your browser does not support iframes.</p>
</iframe>

<p>Click the button inside the iframe to change the background color of the iframe's parent document.</p>

</body>
</html>