json datetime format in javascript

function formatJSONDate(jsonDate) {

    //2014-09-05T00:00:00

    var today = new Date(jsonDate);

    var date = today.getDate();

    var month = today.getMonth() + 1; //January is 0. so we add + 1;

    if (date < 10) {

        date = '0' + date

    }

    if (month < 10) {

        month = '0' + month

    }

    var today = date + FormatMonth(month);

    return today;

}

function FormatMonth(jsonMonth) {

    var month = '';

    switch (jsonMonth) {

        case "01":

            month = "Jan";

            break;

        case "02":

            month = "Feb";

            break;

        case "03":

            month = "Mar";

            break;

        case "04":

            month = "Apr";

            break;

        case "05":

            month = "May";

            break;

        case "06":

            month = "Jun";

            break;

        case "07":

            month = "Jul";

            break;

        case "08":

            month = "Aug";

            break;

        case "09":

            month = "Sep";

            break;

        case "10":

            month = "Oct";

            break;

        case "11":

            month = "Nov";

            break;

        case "12":

            month = "Dec";

            break;

    }

    return month;

}