ArcIMS layer does not have a proper clone method. patch=bartvde,

r=me, tests pass in Safari and IE, (Closes #2490)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@10666 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/ArcIMS.js

@@ -420,6 +420,29 @@ OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
             }
         });
     },
+
+    /**
+     * Method: clone
+     * Create a clone of this layer
+     *
+     * Returns:
+     * {<OpenLayers.Layer.ArcIMS>} An exact clone of this layer
+     */
+    clone: function (obj) {
+
+        if (obj == null) {
+            obj = new OpenLayers.Layer.ArcIMS(this.name,
+                                           this.url,
+                                           this.getOptions());
+        }
+
+        //get all additions from superclasses
+        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
+
+        // copy/set any non-init, non-simple values here
+
+        return obj;
+    },
     
     /**
      * Method: addTile