allow an option to kill all other popups on addition of new one

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1004 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -357,8 +357,17 @@ OpenLayers.Map.prototype = {
 
     /** 
     * @param {OpenLayers.Popup} popup
+    * @param {Boolean} exclusive If true, closes all other popups first
     */
-    addPopup: function(popup) {
+    addPopup: function(popup, exclusive) {
+
+        if (exclusive) {
+            //remove all other popups from screen
+            for(var i=0; i < this.popups.length; i++) {
+                this.removePopup(this.popups[i]);
+            }
+        }
+
         popup.map = this;
         this.popups.push(popup);
         var popupDiv = popup.draw();