Issue #504506 by andypost, pillarsdotnet, podarok: Drupal.formatPlural() did not pass on extra arguments for translations of some plural values

#310139 by fonant, c960657, pwolanin: drupal_urlencode() and Drupal.encodeURIComponent was used to encode query strings and other components it should not have been used for

#272636 by evolvingweb, dvessel: add 'js' class to html tag in drupal.js instead of overwriting all its classes with 'js'

#201141 by yched: instead of 'HTTP error 200' messages when a PHP error occurs, actually display the PHP error message

#157752 by quicksketch: extend AHAH functionality to most types of form elements, without writing JavaScript. Also AHAH enable the blocks admin page.

#177906 by douggreen: JavaScript cookie detection should use path=/ to avoid broken situations when run at a 'subdirectory'

#118026 by kkaefer with fixes from myself: JavaScript translation support and script.js as a default theme JS file to use, if found

#127539: progressive operation support, refactoring update.php code to a generic batch API to support runnning operations in multiple HTTP requests
  - update.php is already on the batch API
  - node access rebuilding is in the works
  - automatic locale importing is in the works

 Thanks to Yves Chedemois (yched) for the good code quality, very wide awareness of issues related to batches,
 and the fantastic turnaround times. Hats off.

- #88642: Change drupal.js function separators to semi-colons.

1) There is a race condition created by calling send() before setting the callback function. Admittedly, this race shouldn't be lost, but it's not good practice to bet on winning races in code.

2) Line 55 is redundant. Since the value of bAsync is based on the non/existence of callbackFunction, there is no need to check both variables later.

- #31968: IE
- #41743: Safari