function today() {
    var b = new Date();
    var d = b.getFullYear();
    var e = b.getMonth() + 1;
    var c = b.getDay();
    var a = b.getDate();
    return d + "/" + e + "/" + a
}
function addDate(h, f, i) {
    var g = new Date(h);
    var c = new Date();
    var b = c.getDate();
    var e = c.getDay();
    var a = new Array("日", "月", "火", "水", "木", "金", "土");
    switch (f) {
        case "Y": g.setFullYear(g.getFullYear() + Number(i));
            break;
        case "M": g.setMonth(g.getMonth() + Number(i));
            break;
        case "D": g.setDate(g.getDate() + Number(i));
            break;
        default:
            return null
    }
    document.write([
        g.getMonth() + 1,
        g.getDate()
    ].join("/") + "(" + a[e] + ")")
};