Javascript - possible to remove element of an associative array
<p>Is it possible to remove an element of a Javascript associative array (i.e., set back to native undefined)?</p>

<p>When I tried simply <code>alert(array['knownKey']); array['knownKey']=undefined; alert(array['knownKey']);</code> ... the second alert produced the literal undefined... whereas, the first alert returned nothing.</p>
