diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 61d4bdb632..fa7d5a5a8c 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -26,7 +26,32 @@ OpenLayers.Map = OpenLayers.Class({
 
     /**
      * Constant: EVENT_TYPES
-     * {Array(String)} supported application event types
+     * {Array(String)} Supported application event types.  Register a listener
+     *     for a particular event with the following syntax:
+     * (code)
+     * map.events.register(type, obj, listener);
+     * (end)
+     *
+     * Supported map event types:
+     *  - *addlayer* triggered after a layer has been added
+     *  - *removelayer* triggered after a layer has been removed
+     *  - *changelayer* triggered after a layer name change, order change, or
+     *      visibility change (due to resolution thresholds)
+     *  - *movestart* triggered after the start of a drag, pan, or zoom
+     *  - *move* triggered after each drag, pan, or zoom
+     *  - *moveend* triggered after a drag, pan, or zoom completes
+     *  - *popupopen* triggered after a popup opens
+     *  - *popupclose* triggered after a popup opens
+     *  - *addmarker* triggered after a marker has been added
+     *  - *removemarker* triggered after a marker has been removed
+     *  - *clearmarkers* triggered after markers have been cleared
+     *  - *mouseover* triggered after mouseover the map
+     *  - *mouseout* triggered after mouseout the map
+     *  - *mousemove* triggered after mousemove the map
+     *  - *dragstart* triggered after the start of a drag
+     *  - *drag* triggered after a drag
+     *  - *dragend* triggered after the end of a drag
+     *  - *changebaselayer* triggered after the base layer changes
      */
     EVENT_TYPES: [ 
         "addlayer", "removelayer", "changelayer", "movestart", "move",