| <!doctype html> | |
| <meta charset=utf-8> | |
| <body> | |
| <script> | |
| // Step 4 (html/browsers/windows/post-message/third-party-to-third-party-cross-partition-same-origin.sub.html) | |
| window.top.opener.postMessage("Site 2 Frame B", window.top.opener.origin); | |
| </script> | |
| </body> |