filter inputs with numbers only

filter-input-only-numbers.html

<script>
 var inputNumberElite = document.querySelectorAll('input[type="number"]');
        for (var i = 0, len = inputNumberElite.length; i < len; i++) {
            inputNumberElite[i].addEventListener("keypress", function(evt) {
                if (evt.which != 8 && evt.which != 0 && evt.which < 48 || evt.which > 57) {
                    evt.preventDefault();
                }
            })
        }
        </script>