step toward standardization of id policy... for popups

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1416 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Popup.js

@@ -7,7 +7,6 @@
  */
 OpenLayers.Popup = Class.create();
 
-OpenLayers.Popup.count = 0;
 OpenLayers.Popup.WIDTH = 200;
 OpenLayers.Popup.HEIGHT = 200;
 OpenLayers.Popup.COLOR = "white";
@@ -56,8 +55,11 @@ OpenLayers.Popup.prototype = {
     * @param {String} contentHTML
     */
     initialize:function(id, lonlat, size, contentHTML) {
-        OpenLayers.Popup.count += 1;
-        this.id = (id != null) ? id : "Popup" + OpenLayers.Popup.count;
+        if (id == null) {
+            id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
+        }
+
+        this.id = id;
         this.lonlat = lonlat;
         this.size = (size != null) ? size 
                                   : new OpenLayers.Size(