json with multiple objects

1{
2    "cars": {
3        "Nissan": [
4            {"model":"Sentra", "doors":4},
5            {"model":"Maxima", "doors":4},
6            {"model":"Skyline", "doors":2}
7        ],
8        "Ford": [
9            {"model":"Taurus", "doors":4},
10            {"model":"Escort", "doors":4}
11        ]
12    }
13}

1{
2    "cars": {
3        "Nissan": {
4            "Sentra": {"doors":4, "transmission":"automatic"},
5            "Maxima": {"doors":4, "transmission":"automatic"}
6        },
7        "Ford": {
8            "Taurus": {"doors":4, "transmission":"automatic"},
9            "Escort": {"doors":4, "transmission":"automatic"}
10        }
11    }
12}
13
14data.cars['Nissan']['Sentra'].doors   // 4
15data.cars['Nissan']['Maxima'].doors   // 4
16data.cars['Nissan']['Maxima'].transmission   // automatic
17
18for (var make in data.cars) {
19    for (var model in data.cars[make]) {
20        var doors = data.cars[make][model].doors;
21        alert(make + ', ' + model + ', ' + doors);
22    }
23}

1data.cars['Nissan'][0].model   // Sentra
2data.cars['Nissan'][1].model   // Maxima
3data.cars['Nissan'][2].doors   // 2
4
5for (var make in data.cars) {
6    for (var i = 0; i < data.cars[make].length; i++) {
7        var model = data.cars[make][i].model;
8        var doors = data.cars[make][i].doors;
9        alert(make + ', ' + model + ', ' + doors);
10    }
11}