jquery_json_data_receive

$.ajax({
                    type  : "POST",
                    url : "http://phonegap.sustcse10.net/gps_tracker/login_check.php",
                    data  : $("#userLoginForm").serialize(),
                    }).done(function(data) {
                
                       for(var i in data)
                        {
                         var row = data[i];

                        }
                        if (row == "done"){
                            alert("ok");
                        }
                        else {
                            alert("Wrong UserID/Password !!");
                        }

                    }).error(function() {
                      alert ('No Server Response');
                    });