MacBook acting strange after I spilled tea on it.

Three days ago i spilled some tea over my Macbook Pro 15" 2009 (MC118). In panic i shut the Macbook down and restarted but it wouldn't start up. I immediately took my HDD out of the Macbook and left it for three days to dry. After i backed my HDD up i've put it back in and tried to restart and it actually did. The problem now is that when i type i'll get all kinds of symbols instead of letters, the trackpad is selecting everything except for what i want to select and the Macbook is reacting really slow, also graphically, for example when i push the volume buttons it goes really slow and minimazing screens goes in slowmotion. What could be wrong? and is it fixable?