jqGrid uses a jQuery Java Script Library and is written as plugin for that package. For more information on jQuery, please refer to the jQuery web site.
jqGrid's Home page can be found here.
Working examples of jqGrid, with explanations, can be found here.
I started the idea when I needed an easy way to represent database information in my project. The first requirement was speed and the second, independence from server-side technology and the database backend.
-- Tony