Addys That Are Online How Can I Delete Some Of The Email Address's That Come Up On A Drop Down List When I Sign In At Sites Online?

How can I delete some of the email address's that come up on a drop down list when I sign in at sites online? - addys that are online

My operating system is Windows XP. When I am on myspace or somewhere in a list box appears Minutes Email Addys for convenience, but many typos that what I want, they will have to go if I could.