How to make login to my site by facebook login

Hi every one…
I like to keep facebook login for my site. I need step by step procedure…
thanks.

Use Opera and have it store the password. Or any modern browser will store the password, really. Not sure that’s what you’re asking about…

From the subject line, I think that he wants his web site to have a “log in via your Facebook account” button.

He’ll find that info at:
Facebook for Websites