input allow only numbers

only_numbers.js

$(function() {
  $('input[type=number]').keydown(function (e) {
     var key = e.which || e.keyCode;

     if (!e.shiftKey && !e.altKey && !e.ctrlKey &&
     // numbers   
        key >= 48 && key <= 57 ||
     // Numeric keypad
        key >= 96 && key <= 105 ||
     // comma, period and minus, . on keypad
        key == 190 || key == 110 ||
     // Backspace and Tab and Enter
        key == 8 || key == 9 || key == 13 ||
     // Home and End
        key == 35 || key == 36 ||
     // left and right arrows
        key == 37 || key == 39 ||
     // Del and Ins
        key == 46 || key == 45)
        return true;

    return false;
  });
});