Monetary JQuery mask

money.js

// To use it, jus add the "money" class on your input field
$('.money').on('keypress', function (e) {
    // Accept only numbers
    var charCode = (e.which) ? e.which : e.keyCode;
    if (charCode != 46 && charCode > 31
        && (charCode < 48 || charCode > 57))
        return false;

}).on('keyup', function (e) {

    var v = $(this).val().replace(/\D/g,"");
    if(v == ''){
        $(this).val('0,00')
    }else{
        var newV = '';

        v = parseInt(v).toString();

        if(v.length < 3){
            for (var i = 0; i < 3 - v.length; i++){
                newV = '0'+newV;
            }
        }
        newV = newV+v;

        newV = newV.split('');
        var sNewv = '';
        var mil = 0;

        for(var i = newV.length - 1; i >= 0 ; i--){
            sNewv = newV[i] + sNewv;
            mil++;
            if(sNewv.length == 2){
                sNewv =  ',' + sNewv;
                mil = 0;
            }

            if(mil == 3 && i > 0){
                sNewv =  '.' + sNewv;
                mil = 0;
            }
        }
        $(this).val(sNewv);
    }
});

Working example: https://fiddle.jshell.net/marcelobdsilva/s11pvckm/