function sample() { var areas = [ { code: 1, name: "北海道地方", color: "red", prefectures: [1] }, { code: 2, name: "東北地方", color: "green", prefectures: [2, 3, 4, 5, 6, 7] }, { code: 3, name: "関東地方", color: "black", prefectures: [8, 9, 10, 11, 12, 13, 14] }, ]; areas[1].color = "pink"; areas[2].color = "yellow"; $("#v").japanMap({ areas: areas, showsAreaName: true // 地域名を表示する });