function MappingUtils() {
}

MappingUtils.commaFormat = function(amount) {
    var i = parseInt(amount);
    if (isNaN(i)) { return ''; }

    var delimiter = ",";
    var a = [];
    while (amount.length > 3) {
        var nn = amount.substr(amount.length - 3);
        a.unshift(nn);
        amount = amount.substr(0, amount.length - 3);
    }
    if (amount.length > 0) { a.unshift(amount); }
    amount = a.join(delimiter);
    return amount;
};