인풋 가격 콤마찍기

$(".numberFormat").each(function(){
                $(this).keyup(function(){
                var val = $(this).val();
                var res = numberWithCommas(numberWithUncommas(val));
                $(this).val(res);
                });
        });

function numberWithCommas(x) {
    return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

function numberWithUncommas(x) {
    return x.toString().replace(/[^\d]+/g, '');
}