要重用 Drupal7 的 藍色㘣形 loading gif:<div class="ajax-progress ajax-progress-throbber"><div class="throbber"> </div></div>
$('a').after('<div class="ajax-progress ajax-progress-throbber"><div class="throbber"> </div></div>');
//... 移走
complete: function (jqXHR, textStatus) {
$('.ajax-progress').remove();
}