I agree with digital on this one. Either take the hdd out and see if anyone you know has a laptop you can use to try the hdd in to get the pictures. Or you could try drying the laptop out, don't know if it would be of any use though. Depends on how much beer was spilled and where it went.
There is a few things that I would do in this situation. They are as follows:
1.) Take the HDD out and try to hook it to another computer via SATA/IDE to USB cable(Best Buy)
2.) Take the HDD out and plug it into another computer(Not Recommended by Me)
Either of these may work but number one is your best bet in my opinion because you don't have to take the risk of damaging another laptop in the process of retrieving the photos,