A few problems with my car

[WoBoxster]

So the other day i went out for the night. I parked my car for awhile at a friends place. When i was ready to leave it was raining a bit. I get in the car and turn it on and the windsheild wipers wont work, the head lights wont work and the de-froster wont work either. I turned the car off and on a few times and then everything worked fine. So then tonight when i get in my car to drive home the same thing happened only this time it wouldn't work even when i turned the car off and on. So i had to drive home with out my head lights working, but about half way home i figured out that if i hold down the "brights" on my head light that they would turn on but when i let go it would just turn back off. Any ideas on whats causing this?