+ * @See The state field in pz2watch.xhtml<br/> \r
+ * The state listeners windowlocationhashListener() and StateListener()\r
+ * in listeners.js<br/>\r
+ * The method {@link com.indexdata.mkjsf.pazpar2.Pz2Bean#handleQueryStateChanges}<br/>\r
+ * The class {@link com.indexdata.mkjsf.pazpar2.state.Pazpar2State}<br/> \r
+ * ... for a complete picture of browser history handling.\r
+ * \r