Adjusting the height of an IFRAME to match its content page's height can be a real drag when the containing and content pages are not from the same domain.
Do the Cross-Origin Resource Sharing (CORS) headers make it possible for the content page to authorize cross-domain access to its resources and thus allow its containing page to read its height? (or, alternatively, the containing page authorize the content page to announce its height?)
Or is CORS strictly an AJAX thing?