add Bounds.intersectsBounds() function and tests

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1529 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/BaseTypes.js

@@ -474,7 +474,27 @@ OpenLayers.Bounds.prototype = {
         }              
         return contains;
     },
- 
+
+    /**
+     * @param {OpenLayers.Bounds} bounds
+     * @param {Boolean} inclusive Whether or not to include the border. 
+     *                            Default is true
+     *
+     * @return Whether or not the passed-in OpenLayers.Bounds object intersects
+     *         this bounds. Simple math just check if either contains the other, 
+     *         allowing for partial.
+     * @type Boolean
+     */
+    intersectsBounds:function(bounds, inclusive) {
+
+        if (inclusive == null) {
+            inclusive = true;
+        }
+
+        return (this.containsBounds(bounds, true, inclusive) ||
+                bounds.containsBounds(this, true, inclusive));
+    },
+    
     /**
     * @param {OpenLayers.Bounds} bounds
     * @param {Boolean} partial If true, only part of passed-in