Thanks. Interesting article, but I wonder how much of it is current? The Option key should be the same as Alt, but it does not seem to work that way. I tried rearranging the keycodes to use the Command key with another key and the Shift-Cmd-E combination does something using ctrlKey. Apparently the Cmd key should be metaKey, but not with Opera.
Perhaps it is the whole Javascript that is not workable on a Mac. I wish I knew more about how that works. It works fine on Windows Opera.