In a Javascript library, I need to define a callback that is called whenever ANY page in the Activity is entered. So, this would seem to be a good use of:

CF.activity().page('MyWellKnownPage').onEntry = function() {
...
}

However, in the library, I don't want to assume what the names of pages are. Is there a way to add onEntry page callbacks if I don't want to assume ahead of time what the page names are going to be? Or maybe a way to get the list of pages in an activity, and then define the onEntry callback for each of the pages?