Untitled

<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).on("keypress", function (event) {
   if (event.which !== 0) {
      console.log('blocking keypress event');
      event.preventDefault();
   }
});
</script>
</head>
<body>
    <div>
        <label>Name: </label><input type="text" id="bef">
    </div>
</body>
</html>