how to read below json format data in javascript/jquery function

how to read below json format data in javascript/jquery function

how to read all JSON data either loop or recursion function please give me function which read this JSON data.
Thanx

jQuery1710695295648416637_1362076785226({
    "data": [
    { 
        "userLogin": "amit",
        "text": "1\n",
        "next": [
        {
            "userLogin": "amit",
            "text": "1.1\n",
            "next": [
            {
                "userLogin": "amit",
                "text": "1.2\n",
                "next": [
                {
                    "userLogin": "amit",
                    "text": "1.3\n",
                    "next": [
                    {
                        "userLogin": "amit",
                        "text": "1.4\n",
                        "next": [
                        {
                            "userLogin": "amit",
                            "text": "1.5\n",
                            "next": [
                        ]
                        },
                        {
                            "userLogin": "amit",
                            "text": "1.6\n",
                            "next": [
                        ]
                        }
                        ]
                    }
                    ]
                },
                {
                    "userLogin": "amit",
                    "text": "1.2.1\n",
                    "next": [
                    {
                        "userLogin": "amit",
                        "text": "1.2.2\n",
                        "next": [
                    ]
                    }
                    ]
                }
                ]
            }
            ]
        }
        ]
    },
    {
        "userLogin": "amit",
        "text": "2\n",
        "next": [
        {
            "userLogin": "amit",
            "text": "2.1\n",
            "next": [
            {
                "userLogin": "amit",
                "text": "2.2\n",
                "next": [
                {
                    "userLogin": "amit",
                    "text": "2.3\n",
                    "next": [
                    {
                        "userLogin": "amit",
                        "text": "3.5\n",
                        "next": [
                    ]
                    }
                    ]
                }
                ]
            },
            {
                "userLogin": "amit",
                "text": "2.1.1\n",
                "next": [
            ]
            }
            ]
        }
        ]
    }
    ],
    "responseCode": 200
});