Close iframe cross domain

Question

I am trying to do something similar to the Clipper application here http://www.polyvore.com/cgi/clipper

I can make the iframe appear in another website (cross domain

Answer 1

There is another implementation of the old hash hack. It's backwards compatible, easy javascript-only, and very easy to implement:

http://www.onlineaspect.com/2010/01/15/backwards-compatible-postmessage/