// Combining YWA and YWAT objects
function YWAT(pid) {
    /* constructor code */
}

YWAT.prototype = {
    /* prototype */
};

YWAT.PID = 12345;
...
YWAT.getTracker = function (pid) {
    /* assorted boilerplate */
    return new YWAT(pid);
};

// Or namespacing
YWA.Tracker = function (pid) {
    ...
};

YWA.getTracker(pid) {
    /* assorted boilerplate */
    return new YWA.Tracker(pid);
}

// Or if the class constructor needs to be private
(function (win, doc, undef) {
    function Tracker(pid) {
        ...
    }

    YWA = {
        ...
        getTracker: function (pid) {
            /* assorted boilerplate */
            return new Tracker(pid);
        }
    };
})(window, document);