function showDate() {
    var result;
    var now = new Date();
    var year = now.getYear();
    var month = now.getMonth() + 1;
    var date = now.getDate();
    switch (now.getDay()) {
        case 0: day = "日";
            break;
        case 1: day = "一";
            break;
        case 2: day = "二";
            break;
        case 3: day = "三";
            break;
        case 4: day = "四";
            break;
        case 5: day = "五";
            break;
        case 6: day = "六";
            break;
    }

    result = year + "年" + month + "月" + date + "日" + " 星期" + day;
    return result;
}

document.write(showDate());