fixArgs = function(args) {
        var a = Y.Array(args, 0, true), target;
        if (Y.UA.gecko) {
            a[0] = DOM_MOUSE_SCROLL;
            target = Y.config.win;
        } else {
            target = Y.config.doc;
        }

        if (a.length < 3) {
            a[2] = target;
        } else {
            a.splice(2, 0, target);
        }

        return a;
    }
Adds mousewheel event support
@module event
@submodule event-mousewheel