24h -> AM-PM

const TIME_SEP = "-";
const AMPM_SEP = " ";

const reTimeSplit = /(.*?)(\d{2})-(\d{2})-(\d{2})(.*)/;
const FULL_RSLT = 0, BEF_TIME = 1, TIME_HR = 2, TIME_MIN = 3, TIME_SEC = 4, AFT_TIME = 5;

const AM = 0, PM = 1;
const AMPM = ["AM", "PM"];

var aTime = [];

// If the regex fails (return nothing) display an error and exit the script
if (reTimeSplit.test(item.newBasename) == False) { return null; }

aTime = reTimeSplit.exec(item.newBasename);
if ( parseInt(aTime[TIME_HR]) > 12 ){
return aTime[BEF_TIME] + zpad((parseInt(aTime[TIME_HR]) - 12).toString(), 2) + TIME_SEP + aTime[TIME_MIN] + TIME_SEP + aTime[TIME_SEC] + AMPM_SEP + AMPM[PM] + aTime[AFT_TIME];}
else{
return aTime[BEF_TIME] + aTime[TIME_HR] + TIME_SEP + aTime[TIME_MIN] + TIME_SEP + aTime[TIME_SEC] + AMPM_SEP + AMPM[AM] + aTime[AFT_TIME];
}

// Function that add leading zeros to any string
function zpad(str, nb_digits)
{
    if (str.length < nb_digits)
        { return (Array(nb_digits - str.length + 1).join('0') + str); }
    else
        { return str; }
}