Calling Servlet using Jquery

I am trying to retrieve from a servlet using Jquery

$(document).ready(function() {
    $("#mybutton").click(function(event) {
        alert('1');
        $.get("http://localhost:8888/ntlm/getuser", function(data) {
            alert('data ' + data);
            $(".errorMssg").text("Data Loaded: " + data);
            alert('data ' + data);
        });
        return true;
    });
});

and in GetUser servlet I have

public void doGet(HttpServletRequest request, 
                  HttpServletResponse response) throws ServletException, 
                                                       IOException {
    response.setContentType(CONTENT_TYPE);
            response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    out.print("Authenticating?");
}

protected void doPost(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, 
                                                           IOException {
    doGet(request, response);
}

If I directly access http://localhost:8888/ntlm/getuser, I am able to see output, however when I calling using Jquery, not able to see the output.

What could be the reason for this?