Friends, if u dont know the email ids of your fb friends, So here is a trick for this.

Steps:

(If u have gmail id or other than do from start)

1. If your Facebook account is not connected with Yahoo id then first Create an email id in yahoo and connect your Facebook account with  your Yahoo.

2. Now go to the contacts tab (in ur yahoo id.)

3. Click on Import contacts, and choose Facebook...

  4. In Pop Up You will be asked to confirm whether you want 

to share contacts.. Allow sharing..

5. Wait for sometime, and voila, the contacts are connected 

with each other...

Thats it..click

on View imported contacts and you can see your friends 6. Thats it ! Click

Email..

If u want to find it in Gmail, do the same, although, not all 

the steps are the same, but they are almost similar...