using iframe to display the other site content

Question

I see the websites displaying other websites in their website using iframe.

Example:

http://www.bigresource.com/Tracker/Track-vb-c9WiXD1ijR/

this site displays codeguru.com content.

Is this legally allowed? Should they need permission from codeguru.com explicitly to display their content?

Answer 1

Definitely a moot point.

http://www.publaw.com/framing.html