The Hidden markers show in cluster icon in google map api v3?

When you finished your loop, add .repaint() method, so it will update counters. But the main thing is that you need to add/remove these showed/hidden markers from markerclusterer object automaticly on hide/show marker.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.