I almost told you how to do this (as in, I wrote up the response). But then I realized you should probably be working while at school. The school computers are there for your educational benefit, not your social life. Besides, how many of your friends are online while you are at school? They are, afterall, also at school. Try learning at school, it actually is fun. And if you learn enough and do your own research, you can figure out the answer to this question in about 30 seconds, if you are able to run programs from a keychain device. Until then, work on improving your mind.

/me returns to rocking chair w/ walking cane and my stack of books in the library. I've been here since 4 in the morning and am cranky.