title: How to programmatically trigger a leaflet popup via the img of the marker
body: <p>I have a use case for leaflet where i need to have a list of POI on the left, and a leaflet map showing markers for those POI on the right.</p>
  <p>If i click on a marker on the map, i highlight the POI in the list, this works fine.</p>
  <p>However, i also want to do the reverse: if i click on the POI in the list, center the map on the marker for that POI and open it's popup.</p>
  <p>I reckoned that if i could get the right img for the marker and then trigger a clickevent on it via JS, that should work.  But that fails to trigger the popup.  I can't find anything in the docs, blogposts or stackoverflow.</p>
  <p>Anybody with any ideas?</p>