How to delete an email address from the Facebook login screen ?

On Facebook
1 Go to the Facebook login page, and click in the "email" box.
2 Highlight the email address that you want to delete. Use the down arrow on the keyboard, or use your mouse to place the cursor over the address without clicking.
3 Click the "Delete" button on your keyboard to remove the email address.

Internet Explorer
1 Select "Tools" from the Internet Explorer menu.
2 From the Tools menu, click on "Internet Options," then on "General."
3 Select "Delete" under "Browsing History." Check "Form Data," and then click "Delete."

Firefox
1 Select "Tools" from the Firefox menu.
2 Choose "Clear Recent History." Make sure the "Time range to clear" option is set to remove "Everything."
3 Expand the "Details" section, and make sure "Form and Search History" are checked.
4 Click "Clear Now" to delete your form data. Answered Jan, 01 2011

Hey, you can try this one:

  

http://www.ehow.com/how_5828272_delete-address-facebook-login-screen.html

Answered Nov, 04 2010

Check on your user library for any skype file.
Or uninstall it and reinstall it, your account info is stored online so you will not loose your saved contacts. Answered Apr, 15 2011

 The simplest way is when you leave your gmail,log out at first,then log in with a ID not really existe.

Then the others can't find your gmail name

Answered Sep, 12 2010