input type number only jQuery

<script>
// Restricts input for each element in the set of matched elements to the given inputFilter.
(function($) {
  $.fn.inputFilter = function(inputFilter) {
    return this.on("input keydown keyup mousedown mouseup select contextmenu drop", function() {
      if (inputFilter(this.value)) {
        this.oldValue = this.value;
        this.oldSelectionStart = this.selectionStart;
        this.oldSelectionEnd = this.selectionEnd;
      } else if (this.hasOwnProperty("oldValue")) {
        this.value = this.oldValue;
        this.setSelectionRange(this.oldSelectionStart, this.oldSelectionEnd);
      }
    });
  };
}(jQuery));


// Install input filters.
$("#uintTextBox").inputFilter(function(value) {
  return /^\d*$/.test(value); });
$("#intLimitTextBox").inputFilter(function(value) {
  return /^\d*$/.test(value) && (value === "" || parseInt(value) <= 500); });
$("#intTextBox").inputFilter(function(value) {
  return /^-?\d*$/.test(value); });
$("#floatTextBox").inputFilter(function(value) {
  return /^-?\d*[.,]?\d*$/.test(value); });
$("#currencyTextBox").inputFilter(function(value) {
  return /^-?\d*[.,]?\d{0,2}$/.test(value); });
$("#basicLatinTextBox").inputFilter(function(value) {
  return /^[a-z]*$/i.test(value); });
$("#extendedLatinTextBox").inputFilter(function(value) {
  return /^[a-z\u00c0-\u024f]*$/i.test(value); });
$("#hexTextBox").inputFilter(function(value) {
  return /^[0-9a-f]*$/i.test(value); });
</script>




<table>
  <tr><td>Integer (positive only):</td><td><input id="uintTextBox"></td></tr>
  <tr><td>Integer (positive and &lt;= 500):</td><td><input id="intLimitTextBox"></td></tr>
  <tr><td>Integer (both positive and negative):</td><td><input id="intTextBox"></td></tr>
  <tr><td>Floating point (use . or , as decimal separator):</td><td><input id="floatTextBox"></td></tr>
  <tr><td>Currency (at most two decimal places):</td><td><input id="currencyTextBox"></td></tr>
  <tr><td>A-Z only:</td><td><input id="basicLatinTextBox"></td></tr>
  <tr><td>Latin letters only (most European languages):</td><td><input id="extendedLatinTextBox"></td></tr>
  <tr><td>Hexadecimal:</td><td><input id="hexTextBox"></td></tr>
</table>