toggleRoute() was designed to be used on a page that has a single
directions instance. In your case you have two, so you have to tell it
which one you're talking about:

                function toggleRoute(num) {
                  var polyline = directionsArray[num].getPolyline();
                  if (polyline.isHidden()) {
                        polyline.show();
                  } else {
                        polyline.hide();
                  }
                }

And then call "toggleRoute(0)" or "toggleRoute(1)" when the links are
clicked.

-- 
Mike Williams
http://econym.org.uk/gmap


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