| <!DOCTYPE html> | |
| <p>If this message appears, then this frame has not been navigated.</p> | |
| <script> | |
| window.onload = function() { | |
| try { | |
| location.href = "data:text/html,\u003c!DOCTYPE html\u003e\u003cp\u003eIf this message appears, then this frame has been navigated.\u003c/p\u003e\u003cscript\u003eparent.postMessage('can navigate', '*');\u003c/script\u003e"; | |
| } catch(e) { | |
| parent.postMessage("can not navigate", "*"); | |
| } | |
| } | |
| </script> |