changing iframe url changes parent window url

Question

i\'m using following page to display content of a url in a iframe and changing it based on input value .

Answer 1

From www.coolmath.com:

if (window.self != window.top) ...

meaning the site activly escapes being framed.

Answer 2

You may notice that even something like this <iframe src='http://www.coolmath-games.com/0-fraction-splat/index.html'></iframe> results in the same. This is a technique called frame-busting. It's in their page's code:

<script>
<!-- Hide Script
 if (top.location != self.location) {
   top.location = self.location
 }
//End Hide Script-->
</script>

If you have a server, that can respond with a HTTP/1.1 204 No Content header, you may be able to "deactivate" this frame buster as described here.