#633: Fix memory leak in box marker used for boxes layer. Add comprehensive

tests for Box marker.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@3026 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Marker/Box.js

@@ -33,6 +33,17 @@ OpenLayers.Marker.Box.prototype =
         this.setBorder(borderColor, borderWidth);
     },
 
+    /**
+     * 
+     */    
+    destroy: function() {
+
+        this.bounds = null;
+        this.div = null;
+
+        OpenLayers.Marker.prototype.destroy.apply(this, arguments);
+    },
+
     /** Allow the user to change the box's color and border width
      * 
      * @param {String} color Default is "red"