[jQuery] events for when getJSON fails?

[jQuery] events for when getJSON fails?


I've got a getJSON request from a different domain which will be
going down for a few hours while that domain upgrades its servers.
What happens to a getJSON request when the url you request will not
return any HTTP traffic? Does it just hang? Does it fail gracefully
or return a boolean value that I can capture? Also, is it possible to
get HTTP headers off this method?