diff -r 19b4ddc302a6 -r 6448c284fe21 javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/OnReceive.java
--- a/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/OnReceive.java	Fri Apr 05 12:43:17 2013 +0200
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/OnReceive.java	Mon Apr 08 16:51:30 2013 +0200
@@ -38,4 +38,17 @@
      * @return the (possibly parametrized) url to connect to
      */
     String url();
+    
+    /** Support for <a href="http://en.wikipedia.org/wiki/JSONP">JSONP</a> requires
+     * a callback from the server generated page to a function defined in the
+     * system. The name of such function is usually specified as a property
+     * (of possibly different names). By defining the <code>jsonp</code> attribute
+     * one turns on the <a href="http://en.wikipedia.org/wiki/JSONP">JSONP</a> 
+     * transmission and specifies the name of the property. The property should
+     * also be used in the {@link #url()} attribute on appropriate place.
+     * 
+     * @return name of a property to carry the name of <a href="http://en.wikipedia.org/wiki/JSONP">JSONP</a>
+     *    callback function.
+     */
+    String jsonp() default "";
 }