Here is a quick little code snippet that can be added to a hook_form_alter() function in Drupal. It adds a little Javascript to automatically set a field value to upper-case.
// Modify this array to show the actual field names in your form. $uppercase_fields = array( 'field_textfield1', 'field_textfield2', 'field_textfield3', ); foreach($uppercase_fields as $delta => $item) { $filter .= "input:text[@name^=$item],"; } drupal_add_js(" $(document).ready(function () { $('$filter').change(function() {