Though I'm not sure what exactly Ojan is proposing we forbid?I think his suggestion is to forbid all of window.prompt, window.alert, and window.showModalDialog. Persumably window.confirm as well.
Exactly. But we don't need a spec to tell that. It's 100% user agent feature, so you're free to have better or worse UI. Same could be said when the user right-clicks.
