A plurality of main seal patterns and dummy seal patterns are formed by a sealant on one of substrates. The messages are displayed inside the space of the webpage where usually banners are shown. Location request messages providing one or more transmitter IDs in communication range with a query portable electronic device and a transmitter ID of the query portable electronic device are received and location information from the stored location information associated with the one or more transmitter IDs received in the location request message is retrieved. This structure enables improvement in operation performance without increasing the layout area in the case where a DRAM cell is formed in a SOI structure.