ajax_loading.js

$(document).ready(function() {

  $(".ajax_request").bind('ajax:before', function(evt, status, data, xhr) {
    showAjaxLoading();
  });

  $(".ajax_request").bind('ajax:complete', function(evt, status, data, xhr) {
    hideAjaxLoading();
  });

  $(".disable_page").bind('ajax:before', function(evt, status, data, xhr) {
    disable_page();
  });

  $(".disable_page").bind('ajax:complete', function(evt, status, data, xhr) {
    enable_page();
  });

  $(".ajax_form").bind('ajax:before', function(evt, status, data, xhr) {
    $(this).find('input[type=submit]').attr('disabled', 'disabled')
  });

  $(".ajax_form").bind('ajax:complete', function(evt, status, data, xhr) {
    $(this).find('input[type=submit]').removeAttr('disabled')
  });
});