Merge pull request #184 from fredj/get-url-async

Change getUrlAsync parameters. r=ahocevar

lib/OpenLayers/Layer/ArcIMS.js

@@ -205,12 +205,10 @@ OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
      * Parameters:
      * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
      *     request.
-     * scope - {Object} The scope of the callback method.
-     * prop - {String} The name of the property in the scoped object to 
-     *     recieve the image url.
      * callback - {Function} Function to call when image url is retrieved.
+     * scope - {Object} The scope of the callback method.
      */
-    getURLasync: function(bounds, scope, prop, callback) {
+    getURLasync: function(bounds, callback, scope) {
         bounds = this.adjustBounds(bounds);
         
         // create an arcxml request to generate the image
@@ -239,11 +237,7 @@ OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
                 var axlResp = new OpenLayers.Format.ArcXML();
                 var arcxml = axlResp.read(doc);
                 
-                scope[prop] = this.getUrlOrImage(arcxml.image.output);
-
-                // call the callback function to recieve the updated property on the
-                // scoped object
-                callback.apply(scope);
+                callback.call(scope, this.getUrlOrImage(arcxml.image.output));
             },
             scope: this
         });