/*

 * This script will request HTML from example.com every 4 seconds and put it

  * in the div with the id "output".

 */

​

var timeout;

​

$(document).ready(

  function() { // callback function for $.ready()

    timeout = setTimeout(

      function() { // function to run every 4 seconds

        $.get('http://example.com/',

              function(data) { // function to run on successful AJAX request

                $('#output').fadeOut('slow',

                                     function() {

                                       // function to call after #output is hidden

                                       $(this).html(data).fadeIn('slow');

                                     }

                                    );

              }

             );

      }

      , 4000);

  }

);

​