I know mIRC has a built in log system, but I don't like it. So this is a very simple log system. Enjoy.

on *:text:*:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | $1- 
} 
on *:action:*:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | $1- 
} 
on *:op:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: +o $opnick 
} 
on *:deop:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: -o $opnick 
} 
on *:Voice:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: +v $vnick 
} 
on *:devoice:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: -v $vnick 
} 
on *:ban:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: +b $bnick $banmask 
} 
on *:unban:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | sets mode: -b $bnick $banmask 
} 
on *:kick:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) _( $chan )_ | $nick | kicks: $knick 
} 
on *:join:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) | $nick | Joined: _( $chan )_ $fulladdress 
} 
on *:part:#:{ 
  /write $chan $+ .txt $date([dd/mm hh:nnTT]) | $nick | Parted: _( $chan )_ $fulladdress 
}