2004-11-13 ■ web opera web opera http://knowledge.yahoo.co.jp/service/question_detail.php?queId=1028409 http://knowledge.yahoo.co.jp/service/question_detail.php?queId=1085299&burl=&more=Y http://knowledge.yahoo.co.jp/service/question_detail.php?queId=268842&burl=&more=Y