All keys on my macbook except capslock-enter-esc-eject-backspace-sound suddenly stopped working. They show up in the keyboard showup in language and text. The correct keys light up there. Any solutions?

My macbook (late 2009) worken fine this morning. Everything was allright.

Now suddenly while i was watching youtube all keys started to fail except the backspace/capslock/enter/esc/sound button/eject/tab. All keys still give sounds when i push em and some of them seems to be doing another action.

At the same moment, the mouse started to ignore the settings or primary and secondary buttons.

Anyone had the same? of know a fix?