unable to get value returned from javascript variable in page

Hi, I have 3 pages....i wrote a js function to get the value of radio button from one jsp page..what i want is to store the value returned from the js function and store it in a variable so that i can use it in my servlet to validate an if else condition.

FirstPG:

2nd page is a normal jsp page...and then from that page i am redirecting to my servlet :

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub

    //System.out.println(request.getAttribute("name"));
    String uname=request.getParameter("uname");
    String pass=request.getParameter("pass");

    //Stringconnect=request.getSession().setAttribute("radiovalue",request.getParameter("env"));
    String connect=request.getParameter("env");
    System.out.println(connect);
    if(uname.equals("admin")&& pass.equals("admin"))
    {
        response.sendRedirect("SuccessAdmin.jsp");

    }
    if(uname.equals("sauro")&& pass.equals("sauro")){
        response.sendRedirect("Success.jsp");
    }
}

I want the value of the radio button from fisrt page to be stored in a variable so that i can use it throughout all the servlets.

please help

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unable to get value returned from javascript variable in page

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