title: Reload markers and list like Foursquare
body: <p>I have map similar to foursquare, with sidebar listing places and map showing markers, I return JSON with description and location,on my sidebar list show all markers and not  the markers with showing on map, I want to do like foursquare , when I 'dragend' reload list on sidebar and markers inside bounds of map, how I do that?</p>