Crude fix for ahah progress bar

I got missing progress bar, and after inspection it turns out that the new ahah progress bar element is added next to the input tag (button).

Thus the styling (sliding - door technique) is broken.

I'm not quite sure that this is the best solution but it works for me :

/**
 * Handler for the form redirection submission. fix for buttonsytle
 */
Drupal.ahah.prototype.beforeSubmit = function (form_values, element, options) {
  // Disable the element that received the change.
  $(this.element).addClass('progress-disabled').attr('disabled', true);

  // Insert progressbar or throbber.
  if (this.progress.type == 'bar') {
    var progressBar = new Drupal.progressBar('ahah-progress-' + this.element.id, eval(this.progress.update_callback), this.progress.method, eval(this.progress.error_callback));
    if (this.progress.message) {
      progressBar.setProgress(-1, this.progress.message);
    }
    if (this.progress.url) {
      progressBar.startMonitoring(this.progress.url, this.progress.interval || 1500);
    }
    this.progress.element = $(progressBar.element).addClass('ahah-progress ahah-progress-bar');
    this.progress.object = progressBar;
    $(this.element).parent().after(this.progress.element);
  }
  else if (this.progress.type == 'throbber') {
    this.progress.element = $('<div class="ahah-progress ahah-progress-throbber"><div class="throbber">&nbsp;</div></div>');
    if (this.progress.message) {
      $('.throbber', this.progress.element).after('<div class="message">' + this.progress.message + '</div>')
    }
    $(this.element).parent().after(this.progress.element);
  }
};

by putting the code above in my theme script.js then the new ahah element is attached after the span tag that wraps the button (input) tag