<script>
$(document).ready(function() {
    $('#ajax_form_submit').click(function(){
        var data=$('#ajax_form').serialize();
        $.post( '{% url add %}', data, function(server_data){ alert(server_data)   }  )
})
})
</script>
<form id='ajax_form'>{% csrf_token %}
<input type='text' name='text'/>
<input type='button' id='ajax_form_submit' value='Send data' />
</form>

def add(request):
    if request.method == "POST" and request.is_ajax():        
        ....do something    
        return HttpResponse('OK')
    return HttpResponse('Fail')

Exception happened during processing of request from ('127.0.0.1', 59185)
Traceback (most recent call last):
  File "c:\Python26\lib\SocketServer.py", line 560, in process_request_thread
    self.finish_request(request, client_address)
  File "c:\Python26\lib\SocketServer.py", line 322, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "c:\Python26\lib\site-packages\django\core\servers\basehttp.py", line 139, in __init__
    super(WSGIRequestHandler, self).__init__(*args, **kwargs)
  File "c:\Python26\lib\SocketServer.py", line 618, in __init__
    self.finish()
  File "c:\Python26\lib\SocketServer.py", line 661, in finish
    self.wfile.flush()
  File "c:\Python26\lib\socket.py", line 297, in flush
    self._sock.sendall(buffer(data, write_offset, buffer_size))
error: [Errno 10053] ╧ЁюуЁрььр эр тр°хь їюёЄ-