How do you remove saved e-mail addresses on facebook?

[Sarah]

Every time I try to log into facebook it always shows the list of past email addresses that have been signed onto facebook in the login box. I have tried to highlight the email addresses on the login screen and delete them like that but it doesn't work, and I have also tried to go to clear recent history and do the time range to clear to everything and also clearing the form and browser history but it never clears the emails. Is there any other way I can clear them besides those?