#loading resources
def load_image(_file_, colorkey=None):
	fullname = os.path.join(os.path.dirname(__file__), _file_)
	try:
		image = pygame.image.load(fullname)
	except pygame.error, message:
		print 'cannot load image:' _file_
		raise SystemExit, message
	iamge = image.convert()
	if colorkey is not None:
		if colorkey is -1:
			colorkey = image.get_at((0, 0))
		image.set_colorkey(colorkey, RLEACCEL)
	return image, image.get_rect()