I got a small app that use the Direction Service feature of Google Map. It is working well, I can change routes, but I have a small problem, where a user could go back to a list of markers after tracing a route.
I can’t find a way to delete routes with google map. For markers I store them and do setMap(null), do not see a way here…
if you are using DirectionsRenderer to display the routes, you can call setMap(null) on it too. That way you delete the displayed route.
Using the example code here
http://code.google.com/apis/maps/documentation/javascript/examples/directions-simple.html
just call