Карты Bing - выберите указанный c маршрут с помощью indexinx

Question

У меня есть следующий код JavaScript, чтобы показать рассчитанный маршрут и варианты на моем сайте. Я хочу предварительно выбрать маршрут с параметром routeIndex, но это не работает.

    var map, infobox, directionsManager, directionWaypointLayer;

    function GetMap() {


        map = new Microsoft.Maps.Map('#myMap', {});
        //Create a layer for managing custom waypoints.
        directionWaypointLayer = new Microsoft.Maps.Layer();

        //Add mouse events for showing instruction when hovering pins in directions waypoint layer.
        Microsoft.Maps.Events.addHandler(directionWaypointLayer, 'mouseover', showInstruction);
        Microsoft.Maps.Events.addHandler(directionWaypointLayer, 'mouseout', hideInstruction);

        map.layers.insert(directionWaypointLayer);

        //Create a reusable infobox.
        infobox = new Microsoft.Maps.Infobox(map.getCenter(), {
            showCloseButton: false,
            visible: false
        });
        infobox.setMap(map);

        //Load the directions module.
        Microsoft.Maps.loadModule('Microsoft.Maps.Directions', function () {
            //Create an instance of the directions manager.
            directionsManager = new Microsoft.Maps.Directions.DirectionsManager(map);
            directionsManager.setRequestOptions({ routeMode: Microsoft.Maps.Directions.RouteMode.driving, maxRoutes: 3, routeIndex: 2, avoidTraffic: false, showInstruction: false });
            var vars = {};

            var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function (m, key, value) {
                vars[key] = value;
            });
            directionsManager.addWaypoint(new Microsoft.Maps.Directions.Waypoint({ location: new Microsoft.Maps.Location(vars["wp1"].split(',')[0], vars["wp1"].split(',')[1]) }));
            directionsManager.addWaypoint(new Microsoft.Maps.Directions.Waypoint({ location: new Microsoft.Maps.Location(vars["wp2"].split(',')[0], vars["wp2"].split(',')[1]) }));

            //Calculate directions.
            directionsManager.calculateDirections();
        });
    }