Iframe Cross Domain Communication - Resize Event - Cross Browser?

When the main Window wants to send message to a child Iframe - It sets the child's Iframe url to its current url+ hash (which represents data). But how would the iframe get's the

Solution 1:

You can use porthole which is a cross browser proxy script for iframes you will need to be able to host a small proxy file on the receiving end of the other iframe though. You can then pass information and events from one iframe to another across browsers and domains

http://ternarylabs.github.io/porthole/