JQuery-AJAX- Basic help

Trying to convert ajax calls over to Jquery.  Right now just in experiment mode for learning reasons.


Wanted I'm trying to do is transform the code below to accept returned JSON data and iterate through it (just alert functionality for now).  The click function belongs to an image.  The PHP page returns JSON data.

Or is there a better way in jquery for ajax calls that return JSON data?


                  $('#ok').click(function() {

                              $.ajax({
                                      type: "get",
                                      url: "agents_lookup.php",
                                      data: "term=a",
                                      success: function(msg){
                                          alert(msg );
                                      }
                                    });
                  
                  
                  });