[Google Maps API v2] Handling infowindow of overlapped polylines in GGeoXml overlay

Hi,
I have overlaid polylines kmz file using GGeoXml on my google map v2.
On click of the overlapped polylines is giving the infowindow of last
overlaid polyline only.
I have posted the same kmz file in http://maps.google.com and seen the
difference like on click of overlapped polylines is giving infowindow
with "nearby results <<prev next>>" and onclick of prev and next links
on infowindow is displaying all other infowindows nearby.

I would like to have the same functionality on click of overlapped
polylines in my map.
Please suggest.
Thank you.

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