Is there any way to do this in PHP (or with a combination of JS)?

[webdev]

There's a login form on page A: http://www.example.com/A.html The 'action' attribute of which is: action="/B.html" So when someone logs in with the form on A.html, the data will be submitted to / visitor redirected to B.html. *Now what I want is*: there's an on /C.html,...