Data array for jQuery AJAX success

On server I am returning an array after some operations. I want to work with this array after the Ajax call succeeds.

var addPaymentType = function(){
    var data = new Object()
    data["function"]        = "add";
    data["payment_type_id"] = $("#payment_types").val();
    data["data"]            = $("#saveform").serializeArray();
    $.ajax({
        type: "POST",
        url: location.href,
        data: data,
        dataType: "JSON",
        success : function (data)
    开发者_JS百科    {
            console.debug(data['plan_pt_id']);
        }
    });
};

But data['plan_pt_id'] is undefined. If I return not an array, all works pretty. But how can I work with array?

Thank you.

---

If data is an array, then you access it with e.g.

data[0]

If the first object in your array has a 'plan_pt_id' property, then you can access that with:

data[0].plan_pt_id

or with

data[0]['plan_pt_id']

The next object would be data[1], etc.

---

Lowercase "json" and data['plan_pt_id'],data['descr']