How can you make multiple overlapping markers in Google Maps open their own infowindow when one is clicked

Question

I am using Google Maps API V3 in javascript. I have multiple markers that are in a close proximity to each other. I want to make it so that when a user clicks a marker the infowindow of that marker and any markers overlapping it will open (I need to bubble the event click to all the other markers that overlap the clicked pixel). I can get the infowindow of the highest z-indexed marker to open, but I need to open the windows of the markers underneath too. Can this be done, and if so how?

Answer 1

Try OverlappingMarkerSpiderfier

https://github.com/jawj/OverlappingMarkerSpiderfier

There is a demo here - http://jawj.github.com/OverlappingMarkerSpiderfier/demo.html

It attempts to give the same 'clustering' behaviour as the Earth Api.