callback for close button on popup (closes #1061)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@4916 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Popup.js

@@ -117,9 +117,10 @@ OpenLayers.Popup = OpenLayers.Class({
     * contentHTML - {String}          The HTML content to display inside the 
     *                                 popup.
     * closeBox - {Boolean}            Whether to display a close box inside
-    *                                 the popup. 
+    *                                 the popup.
+    * closeBoxCallback - {Function}   Function to be called on closeBox click.
     */
-    initialize:function(id, lonlat, size, contentHTML, closeBox) {
+    initialize:function(id, lonlat, size, contentHTML, closeBox, closeBoxCallback) {
         if (id == null) {
             id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
         }
@@ -165,7 +166,7 @@ OpenLayers.Popup = OpenLayers.Class({
             closeImg.style.top = this.padding + "px";
             this.groupDiv.appendChild(closeImg);
 
-            var closePopup = function(e) {
+            var closePopup = closeBoxCallback || function(e) {
                 this.hide();
                 OpenLayers.Event.stop(e);
             }