Input auto format number from https://jsfiddle.net/LM9zZ/2/

auto-format-number.js

$(document).ready(function(){

$("#formattedNumberField").on('keyup', function(evt){
    if (evt.which != 110 ){//not a fullstop
        var n = parseFloat($(this).val().replace(/\,/g,''),10);
        $(this).val(n.toLocaleString());
    }
});

});