keep reading.....
1. Open the website you want to hack. Provide wrong username-password in its log in form.
(e.g : Username : me and Password: ' or 1=1 --)
An error will occur saying wrong username-password. Now be prepared
2. Right click anywhere on that error page =>> go to view source.
3. There you can see the html codings with javascripts.
4. There you find somewhat like this....<_form action="..login....">