[jQuery] [Autocomplete] Detect when autocomplete list is visible

[jQuery] [Autocomplete] Detect when autocomplete list is visible


Hello,
I'm detecting Enter/Return keyup requests, what's a good way to ignore
them when the autocomplete list is visible?
I tried using $('.ac_results').css('display'), but that doesn't work
reliably (it's always none in the keyup handler).
Any ideas appreciated!
-- Charles