enable/disable

hi everyone … I have been wondering if I can have a script that enables and disalbes the certain mac addresses from access list ..
example I want my client’s mac to be disabled at 12:00 till 22:00hrs
then enables from 22:00 - 12:00hrs
is it possible ..
I have been trying but it always requires the print command ..
so could you please help me out about this
thnx in advance

use scripts and scheduling for this purpose.
look at this: http://wiki.mikrotik.com/wiki/Scripts

if you check mangle rules - you will notice time settings there

/ip firewall mangle> add time=
Time ::= Start-End,Day
  Start -- 0s..1d    (time interval)
  End -- 0s..1d    (time interval)
  Day ::= sun|mon|tue|wed|thu|fri|sat[,Day*]

that might be the case when you have to use those.