Jquery

• jquery selection

• jquery transition

• jquery DOM

• Js Event

• jquery manipulation

• jquery plugin

• jquery Ajax

• A selector with several methods (syntax)
  It's more readable to write each method on a new line like the following

$("#rue89-register-status-status")
          .addClass('status-check-informer-progress')
          .html(Drupal.settings.statusCheck.progress);

• How to know which version of jquery is used in a site

// Returns string Ex: "1.3.1"
$().jquery;

// Also returns string Ex: "1.3.1"
jQuery.fn.jquery;

• ajax
  Make an ajax call with jquery
  http://api.jquery.com/jQuery.ajax/