function GetMonthAbbr(MonthNumber) {
    switch (MonthNumber) {
        case "01":
            return "JAN";
            break;
        case "02":
            return "FEB";
            break;
        case "03":
            return "MAR";
            break;
        case "04":
            return "APR";
            break;
        case "05":
            return "MAY";
            break;
        case "06":
            return "JUN";
            break;
        case "07":
            return "JUL";
            break;
        case "08":
            return "AUG";
            break;
        case "09":
            return "SEPT";
            break;
        case "10":
            return "OCT";
            break;
        case "11":
            return "NOV";
            break;
        case "12":
            return "DEC";
            break;
        default:
            return "JAN";
            break;
    }
}