aha, I didn't realized it
so do it using javascript with specific fields
<script type="text/javascript"> $(document).ready(function ($){ $(".register-form input[name='lastname'], .register-form input[name='firstname']").keyup(function(){ $(this).val( $(this).val().toUpperCase() ); }); }); </script>
.png.022b5452a8f28f552bc9430097a16da2.png)