Add some jsdoc commenting into PanZoomBar (part of testing svk)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@420 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/PanZoomBar.js

@@ -103,6 +103,10 @@ OpenLayers.Control.PanZoomBar.prototype =
         centered = centered.add(0, zoomStopSize*(this.map.getZoomLevels()+1));
         return centered; 
     },
+    /*
+     * divClick: Picks up on clicks directly on the zoombar div
+     *           and sets the zoom level appropriately.
+     */
     divClick: function (evt) {
         var y = evt.xy.y;
         var top = Position.page(evt.object)[1];