ajax json data

ajax json data

hey guys im trying to retrieve json data in my ajax request but for some reason it isnt alerting any message when trying to test. does anyone know what im doing wrong please...thank you guys

  1. $("document").ready(function(){
  2.         .ajax({ 
  3.         dataType: "json",
  4.         url: "json.php", 
  5.         data: data,
  6.             success: function(data) {
  7.                 alert(json['notification_message']);
  8.             },
  9.         error:function(){
  10.                 alert('error');
  11.         }   
  12.     });
  13. });