Redirect to external URL from AjaxLink

[Chris Colman]

Is it possible to redirect to an external URL when the AjaxLink onClick
is called?
 
I frequently use setReponsePage to redirect to a mounted page from
within an onClick but this redirects based on page class/parameters.. I
can't see a setResponseUrl (or similar method).
 
Can we use a 
 
throw new RedirectToUrlException
 
within AJAX like we do in constructors of pages when a 'normal' http
page request is being processed?
 
 
Yours sincerely,
 
Chris Colman