Access Facebook account by using 3 different passwords

Recently Facebook mentioned that one can able to access their Facebook account by 3 password types.

For Example your Facebook Password is "password123" then you can also able to login with :



1. PASSWORD123
2. Password123
3. and lastly the password which you set.

this is very useful because when you are accessing in a public newtwork or any other place
simply you can use CAPS and mingle those.