关于json的内容解析

[amu1433]

{
    "results": {
        "n_tbk_item": {
            "item_url": "http://item.taobao.com/item.htm?id=45755582868",
            "num_iid": "45755582868",
            "pict_url": "http://img2.tbcdn.cn/tfscom/i2/TB14GOaIXXXXXbOXVXXXXXXXXXX_!!0-item_pic.jpg",
            "provcity": "浙江 绍兴",
            "reserve_price": "45.00",
            "small_images": {
                "string": [
                    "http://img1.tbcdn.cn/tfscom/i2/710067800/TB2awodcVXXXXaNXpXXXXXXXXXX_!!710067800.jpg",
                    "http://img4.tbcdn.cn/tfscom/i3/710067800/TB2pBEjcVXXXXc4XXXXXXXXXXXX_!!710067800.jpg",
                    "http://img4.tbcdn.cn/tfscom/i1/710067800/TB2tRkpcVXXXXX1XpXXXXXXXXXX_!!710067800.jpg",
                    "http://img4.tbcdn.cn/tfscom/i3/710067800/TB2vLn_cVXXXXcXXpXXXXXXXXXX_!!710067800.jpg"
                ]
            },
            "title": "日系文艺清新绣花棉麻长款围巾 复古森女系纯色花朵刺绣防晒披肩",
            "user_type": "0",
            "zk_final_price": "31.50"
        }
    },
    "request_id": "zqch056tv5cg"
}

var json=上面的内容
alert(json.request_id); 可以获取
string": [
"http://img1.tbcdn.cn/tfscom/i2/710067800/TB2awodcVXXXXaNXpXXXXXXXXXX_!!710067800.jpg",
"http://img4.tbcdn.cn/tfscom/i3/710067800/TB2pBEjcVXXXXc4XXXXXXXXXXXX_!!710067800.jpg",
"http://img4.tbcdn.cn/tfscom/i1/710067800/TB2tRkpcVXXXXX1XpXXXXXXXXXX_!!710067800.jpg",
"http://img4.tbcdn.cn/tfscom/i3/710067800/TB2vLn_cVXXXXcXXpXXXXXXXXXX_!!710067800.jpg"
]
怎么获取上面红色的数据啊
json.results.n_tbk_item.small_images[2] 这个的数据怎么获取...

[slwsss]

alert(json.results.n_tbk_item.small_images.string[2]);

[zchub]

首先肯定是要把json字串转为可以操作的对象 var data = eval("("+json+")"); alert(data.results.n_tbk_item.small_images.string[2]);