Unabl to retrieve request parameters sent using AJAX

Question

Hi
I have a html form
<form name="chpass">
                    <input type="text" name="newPass" id="newPass">
                    <input type="text" name="passwordChange" id="passwordChange">
                    <input type="text" name="user" id="user" value="<%= ((UserRegistrationObj)listItems.get(i)).getfName() %>">
                    <a onclick="ajaxFunction();">New</a>
                </form>Below is javascript code which sent request to server location ChangePass.do as a POST request
     function ajaxFunction(){
     var ajaxRequest;  // The variable that makes Ajax possible!
     try{
          // Opera 8.0+, Firefox, Safari
          ajaxRequest = new XMLHttpRequest();
     } catch (e){
          // Internet Explorer Browsers
          try{
               ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
          } catch (e) {
               try{
                    ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
               } catch (e){
                    // Something went wrong
                    alert("Your browser broke!");
                    return false;
        ajaxRequest.onreadystatechange = function(){
          if(ajaxRequest.readyState == 4){
                    alert(ajaxRequest.responseText);
               document.chpass.passwordChange.value = ajaxRequest.responseText;
     ajaxRequest.open("POST", "ChangePass.do", true);
     ajaxRequest.send(null);
}Now in my java code when I am trying to retrieve parameters in html form, I am getting NULL.
   String userId = request.getParameter("user");
  String newPass = request.getParameter("newPass");What could be the possible reason !

Answer 1

Yes,
Below is my servlet code :
  protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
          String userId = request.getParameter("user");
String oldPass = request.getParameter("oldPass");
  String newPass = request.getParameter("newPass");
  UserRegistrationBackend obj = new UserRegistrationBackend();
  String authMsg = "Authenticated";
     authMsg = obj.changePass(PasswordService.getInstance().encrypt(newPass), userId);
     out.println(authMsg);
        } finally {
            out.close();
    } It is not taking any time for servlet to process. I have debugged it and found.
It is just after last line... that it is waiting somewhere.