Allowing the popup-panning FF hack to be disabled as it causes bad effects when a popup contains flash content. not thrilled with the property name but can't really think of anything better myself. patch by gregers r=me (Closes #1941)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9221 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Popup.js

@@ -152,6 +152,15 @@ OpenLayers.Popup = OpenLayers.Class({
      */
     padding: 0,
 
+    /** 
+     * Property: disableFirefoxOverflowHack
+     * {Boolean} The hack for overflow in Firefox causes all elements 
+     *     to be re-drawn, which causes Flash elements to be 
+     *     re-initialized, which is troublesome.
+     *     With this property the hack can be disabled.
+     */
+    disableFirefoxOverflowHack: false,
+
     /**
      * Method: fixPadding
      * To be removed in 3.0, this function merely helps us to deal with the 
@@ -327,7 +336,7 @@ OpenLayers.Popup = OpenLayers.Class({
         }
         
         //listen to movestart, moveend to disable overflow (FF bug)
-        if (OpenLayers.Util.getBrowserName() == 'firefox') {
+        if (!this.disableFirefoxOverflowHack && OpenLayers.Util.getBrowserName() == 'firefox') {
             this.map.events.register("movestart", this, function() {
                 var style = document.defaultView.getComputedStyle(
                     this.contentDiv, null