webform_submit_button.module

<?php
/**
 * @file
 * Webform submit button module.
 */


/**
 * Implements hook webform_component_info().
 */
function webform_submit_button_webform_component_info() {
  $components = array();
  $components['submit_button'] = array(
    'label' => t('Submit button'),
    'description' => t('Displays Submit Button in the Form as a webform component.'),
    'features' => array(
      'analysis' => FALSE,
      'csv' => FALSE,
      'default_value' => FALSE,
      'description' => FALSE,
      'email' => FALSE,
      'required' => FALSE,
      'conditional' => FALSE,
      'title_display' => FALSE,
      'private' => FALSE,
      'wrapper_classes' => FALSE,
      'css_classes' => FALSE,
    ),
    'file' => 'webform_submit_button_component.inc',
  );

  return $components;
}

/**
 * Implements hook_form_alter().
 */
function webform_submit_button_form_alter(&$form, &$form_state, $form_id) {

  // We only want to execute this in a very particular case where we are
  // rendering a webform for display.  There may be a more elegant way to
  // detect that case.
  if (!isset($form['#node'])) {
    return;
  }

  $is_webform = $form['#node']->type == 'webform';
  $is_webform_render = isset($form['submitted']);
  if (!$is_webform || !$is_webform_render) {
    return;
  }

  // At this point we know that we are rendering a webform.
  foreach ($form['submitted'] as $key => $value) {
    $current_component_type = $value['#webform_component']['type'];

    if ($current_component_type == 'submit_button') {

      // Get the weight of the user's submit button component.
      $current_weight = $value['#webform_component']['weight'];

      // Apply the weight to the actual webform submit button.
      $actions = $form['actions'];
      $actions['#weight'] = $current_weight;

      // Move the webform submit button into the position of the
      // user's submit button component.  Remove the user's component since it
      // was really just a placeholder for the real thing.

      unset($form['actions']);
      unset($form['submitted'][$key]);
      $form['submitted']['submit_button'] = $actions;
    }
  }
}