document.write('
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  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4.     <title>Membuat Validasi Angka Dengan Javascript</title>
  5. </head>
  6. <body>
  7.     <h1>Membuat Validasi Angka Dengan Javascript</h1>
  8.     <h2>Bali Bagus Channel</h2>
  9.  
  10.     <input type="text" onkeypress="return isNumberKey(event)" placeholder="Ketikkan angka" />
  11. </body>
  12. </html>
  13.  
  14. <script type="text/javascript">
  15.     function isNumberKey(evt){
  16.       var charCode = (evt.which) ? evt.which : evt.keyCode
  17.       if (charCode > 31 && (charCode < 48 || charCode > 57))
  18.           return false;
  19.       return true;
  20.     }
  21. </script>
');