function MakeArray(n) {

        this.length = n
        return this


}

dayNames = new MakeArray(7);
dayNames[1] = "日";
dayNames[2] = "一";
dayNames[3] = "二";
dayNames[4] = "三";
dayNames[5] = "四";
dayNames[6] = "五";
dayNames[7] = "六";
function customDateString(oneDate) {
        var theDay = dayNames[oneDate.getDay() + 1];
        var theMonth = oneDate.getMonth() + 1;
        var theYear = oneDate.getYear(); 
        if  (theYear < 1900) { theYear = theYear + 1900};
        var today = theYear + "年" + theMonth + "月" + oneDate.getDate() + "日" + "星期" + theDay;
        return today;
}
document.write(customDateString(new Date()))