ajax and Traversal Array json Instance Code for jQuery

ajax for jQuery and json Instance Code for Traversing Array

jQuery.ajax({ 
      type: "POST", 
      url: "server.json", 
      dataType:'json', 
      data: "", 
      success: function(msg){ 
        var title = ""; 
        jQuery.each(msg,function(key,value){ 
          alert(value.ec_id+"  "+value.ec_title); 
        }) 
      } 
  });