Straßenanbindung mit google maps (apex)

Was muss ich denn in meinem Javascript verändern um ne straßenanbindung zu erstellen?

mein Javascript:

<script

src="http://maps.google.com/maps?file=api&v=2&key=&API_KEY."

type="text/javascript"></script>

<script type="text/javascript">

//<![CDATA[

//globals

var bounds = new GLatLngBounds();

function initMap() {

if (GBrowserIsCompatible()) {

var map = new GMap2(document.getElementById("map"));

var title = "&P2_CUST_STREET_ADDRESS1.";

map.addControl(new GSmallMapControl());

map.addControl(new GMapTypeControl());

var point = new GLatLng(&P1_LOCATION.);

var point = new GLatLng($v('P2_LATITUDE'),$v('P2_LONGTITUDE'));

bounds.extend(point);

map.setCenter(point);

map.setZoom(map.getBoundsZoomLevel(bounds)-4);

var marker = new GMarker(point);

map.addOverlay(marker);

marker.openInfoWindowHtml('<div class="tiny">' +

title.replace(/~/g,"<br />") + '</div>');

}

}

//]]>

</script>

<script type="text/javascript">

var map;

var directionsPanel;

var directions;

function initialize() {

map = new GMap2(document.getElementById("map_canvas"));

map.setCenter(new GLatLng(42.351505,-71.094455), 15);

directionsPanel = document.getElementById("route");

directions = new GDirections(map, directionsPanel);

directions.load("from: 500 Memorial Drive, Cambridge, MA to: 4 Yawkey Way, Boston, MA 02215 (Fenway Park)");

}

</script>