A method for controlling the relative humidity within a battery pack enclosure is provided in which the volume of air within the battery pack is exposed to a volume of desiccant contained within a desiccant enclosure. The glasses exhibit a density less than about 2. In response to the user’s input of the ID and the password by telephone or facsimile, the information management system adjusts My Page data based on the user-related data, stores the adjusted My Page data into a My Page server, and opens My Page of the user. An insulating film including oxygen is subjected to plasma treatment using a high frequency under the conditions where the electron density is 1\xd71011 cm\u22123 or more and the electron temperature is 1.