JavaScript function that allows the deep navigation of an Object, invoking a callback upon every single property

object-navigate.js

var Navigate = (function () {
    "use strict";

    var O, func;

    O = {};
    func = function (obj, callback) {
        var iterator = function (o) {
            var k, cur;
            
            for (k in o) {
                cur = o[k];
                if (O.toString.call(cur) === "[object Object]") {
                    iterator(cur);
                } else {
                    callback(k, cur, o);
                }
            }
        };
        iterator(obj);
    };

    return func;
}());