When a pin is first shown, the marker added event is fired.
Dynamic action on plugin event markerAdded that executes the following JavaScript:
$s("P20_IDLIST", $v("P20_IDLIST")+" "+this.data.id);
this.data.marker.setAnimation(google.maps.Animation.DROP);
(When the map is refreshed, the "log" is cleared)
Notice that when switching from Data Set #1 to Data Set #2 (or vice versa), only those data points
that were not previously shown are triggered.