LogIn Page modified

Hello
Well… the thing is that, learning about how to modify the site, I, unintentionally modified the login page that displays when you want… well.. login, so I cannot login anymore, and because of that, I cannot modify the page anymore, are there other ways to log in or how can I fix this? Thanks
PD: Before I tried to install a plugin (Theme My Login) for users to registrate/login.

The page I need help with: [log in to see the link]