[jQuery] How can I get HTTP status code using $.ajax()

Hi,
I knew I can get "textStatus" in error function of $.ajax().
textStatus are "timeout", "error", "notmodified", "parsererror" or
"success".
But I wanna know the HTTP status code(403, 404, 500, ...) for detail
error information.
How can I get the status code using $.ajax()?
Should I use raw xmlhttprequest to get that??
Thanks,
Philip