add keypress.min.js

neath.html

@@ -7,6 +7,7 @@
     <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
           integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/PapaParse/5.0.1/papaparse.js"></script>
+    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/keypress/2.1.5/keypress.min.js"></script>
     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
     <script type="text/javascript" src="http://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
     <style>