Prevent iframe “This webpage is not available.” error from displaying on website

Question

Is there a way to prevent the error "This webpage is not available." from displaying within an iframe that displayed on another site?

For example, if I have a w

Answer 1

If you are doing anything on the server-side you can test that URL and see if it returns a 404 error

Answer 2

You can use the iframe's onerror="" property to do something creative. Consider this:

<iframe src="foo.bar" onerror="this.location.reload();" />

Hope this helps

Edit: This no longer works.