i think problem is not with show but with that my script must load my DB to show it later, so that is kind of preload, and I don't know how modify with with JS and PHP to made just download that what I see atm, so that must creat some GET links when I move map and give to that GET corners of window and script must made query to DB about what markers are in this window and then load to json, no all before show map, I made my map follow http://googlemapsapi.martinpearman.co.uk/infusions/google_maps_api/basic_page.php?map_id=8 and when you look code <script type="text/javascript" src="../../maps/clustermarker/marker_data_01.php"></script> there is file with markers and my marker_data_01.php have 4MB atm and will have more, and I think there is problem

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