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);
        })
      }
  });