title: HTMLUnit Ajax failing
body: <p>I am using HtmlUnit and trying to get page information.
  URL I am scraping is: <a href="http://www.mpcz.co.in/portal/Bhopal_home.portal?_nfpb=true&amp;_pageLabel=custCentre_viewBill_bpl" rel="nofollow">http://www.mpcz.co.in/portal/Bhopal_home.portal?_nfpb=true&amp;_pageLabel=custCentre_viewBill_bpl</a>
  'submitButton' click calls a ajax which fails. I am not able to find the root cause of the ajax failure. I debugged it using Visual Debugger.</p>
  
  <p>Input data: IVRS, 23046091095250, Bill Desk Payment</p>
  
  <p>Below is code.</p>
  
  <pre><code>final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_31);
  
          webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
              webClient.getOptions().setThrowExceptionOnScriptError(false);
              webClient.getOptions().setCssEnabled(false);
              webClient.getOptions().setUseInsecureSSL(true);
              CookieHandler
                      .setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));
              webClient.setAjaxController(new NicelyResynchronizingAjaxController());
              webClient.getOptions().setTimeout(120000);
              webClient.getOptions().setJavaScriptEnabled(true);
              webClient.waitForBackgroundJavaScript(120000);
  
              webClient.getOptions().setRedirectEnabled(true);
  
              WebClientUtils.attachVisualDebugger(webClient); 
  
  
              webClient.addWebWindowListener(new WebWindowListener() {
  
                  public void webWindowContentChanged(WebWindowEvent event) {
                      System.out.println("WeBWindow_aaa:"+ event.getEventType());
                  }
  
                  public void webWindowClosed(WebWindowEvent event) {
                      System.out.println("WeBWindow_aaa:"+ event.getEventType());
                  }
  
                  public void webWindowOpened(WebWindowEvent event) {
                      System.out.println("WeBWindow_aaa:"+ event.getEventType());
                      // TODO Auto-generated method stub
  
                  }
              });
  
  
              webClient.setJavaScriptErrorListener(new JavaScriptErrorListener() {
  
                  @Override
                  public void timeoutError(HtmlPage page, long arg1, long arg2) {
                      // TODO Auto-generated method stub
                      System.out.println("Erroraaa :" + arg1 );
  
                  }
  
                  @Override
                  public void scriptException(HtmlPage arg0, ScriptException arg1) {
                      // TODO Auto-generated method stub
                      System.out.println("scriptExceptionaaa :" + arg1 );
                  }
  
                  @Override
                  public void malformedScriptURL(HtmlPage arg0, String arg1,
                          MalformedURLException arg2) {
                      // TODO Auto-generated method stub
                      System.out.println("malformedScriptURLaaa :" + arg1 );
  
                  }
  
                  @Override
                  public void loadScriptError(HtmlPage arg0, URL arg1, Exception arg2) {
                      // TODO Auto-generated method stub
                      System.out.println("loadScriptErroraaa :" + arg1 );
  
                  }
              });
  
              HtmlPage page = webClient
                      .getPage("http://www.mpcz.co.in/portal/Bhopal_home.portal?_nfpb=true&amp;_pageLabel=custCentre_viewBill_bpl");
  
              webClient.waitForBackgroundJavaScript(20000);
  
              System.out.println("Page text: " + page.asText());
  
              HtmlTextInput identifier1Textbox = (HtmlTextInput) page.getElementById("chooseIdentifier1");
              identifier1Textbox.setAttribute("value", "IVRS");
  
              HtmlTextInput consumerNoTextbox = (HtmlTextInput) page.getElementById("accntId");
              consumerNoTextbox.setAttribute("value", "23046091095250");
  
              HtmlTextInput gatewayTextbox = (HtmlTextInput) page.getElementById("chooseGateway1");
              gatewayTextbox.setAttribute("value", "Bill Desk Payment");
  
              HtmlButton submitButton = (HtmlButton) page.getElementById("ext-gen31");
              webClient.waitForBackgroundJavaScript(60000);
              page = (HtmlPage) submitButton.click(); 
              webClient.waitForBackgroundJavaScript(60000);
  
  System.out.println("Page text: " + page.asText());
          System.out.println("Finished");
          webClient.close();
  </code></pre>