The following links will show information about passing information between the iframes of a page:
- https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
- http://blog.cakemail.com/the-iframe-cross-domain-policy-problem/
- http://pipwerks.com/2008/11/30/iframes-and-cross-domain-security-part-2/
- http://madskristensen.net/post/iframe-cross-domain-javascript-calls
- http://stackoverflow.com/questions/13757943/access-a-variable-of-iframe-from-parent
- http://benvinegar.github.io/seamless-talk/#/33