Q:

firebug error : no element found

1 client : send request to server via AJAX fn.  
2 Server : response in form of text/xml and it works correctly only 1 or 2 times
response.setContentType("text/xml");
3 but only after 1/2 request, i get error in browser (firebug) and it says No element found 
client : javascript jQuery ajax
server : java servlet
can somebody give any tips to sort out.

A:

can somebody give any tips to sort out.

Look at the HTTP traffic. Figure out if the problem is because of a broken request or a broken response. That will tell you if you need to investigate the server side or the client side code.

