Check it out

menu channel {
  TB:dialog -ma tbd tbd
}
menu nicklist {
  TB
  .1 Minute:/ban -ku60 $chan $1 4 TempBan- 1 Minute
  .5 Minutes:/ban -ku300 $chan $1 4 TempBan- 5 Minutes
  .10 Minutes:/ban -ku600 $chan $1 4 TempBan- 10 Minutes
  .Custom:dialog -me tbd tbd
}
dialog tbd {
  title "Temp Ban"
  size -1 -1 120 78
  option dbu
  list 1, 2 9 50 50, size
  text , 2, 2 1 50 8
  combo 3, 58 20 58 10, drop
  edit "", 4, 86 40 30 10
  text "Choose a time...", 5, 76 11 40 8
  text "Or enter one in seconds", 6, 58 32 58 8
  button "Cancel", 9, 23 63 37 12, cancel
  button "Ban", 10, 64 63 37 12
}
on *:DIALOG:tbd:init:*:{
  did -a tbd 2 $active
  did -a tbd 3 1 Minute : 60
  did -a tbd 3 2 Minutes : 120
  did -a tbd 3 5 Minutes : 300
  did -a tbd 3 10 Minutes : 600
  did -a tbd 3 30 Minutes : 1800
  var %i = 0
  while (%i < $nick($active,0)) {
    inc %i 1
    did -a tbd 1 $nick($active,%i)
  }
}
on *:DIALOG:tbd:sclick:3:{
  did -r tbd 4
}
on *:DIALOG:tbd:sclick:10:{
  if ($did($dname,1).seltext == $null) { .echo -q $input(No user specified,o) | halt }
  else { if ($did($dname,3).seltext == $null) && (($did($dname,4).text == $null) || ($did($dname,4).text !isnum 1-)) {
      var %time = 60
    }
    elseif  ($did($dname,4).text != $null) {
      var %time = $did($dname,4).text
    }
    elseif ($did($dname,3).seltext != $null) {
      var %time = $gettok($did($dname,3).seltext,2,58)
    }
  }
  /ban -ku $+ $remove(%time,$chr(32)) $active $did($dname,1).seltext 4 TempBan- $calc( %time / 60) Minutes
  .timer 1 %time .notice $did($dname,1).seltext You have been unbanned from $active
  dialog -x tbd
}
on $*:TEXT:/^[!@.]tb */si:#:{
  if ($address($nick,4) == $address($me,4)) {
    if (!$3) { halt }
    if ($3 isnum 1-) {
      tb1  $2 $3 $chan
    }
    else {
      tb1 $2 60 $chan
    }
  }
}
alias tb1 {
  if (!$2) { halt }
  /ban -ku $+ $2 $3 $1 4 TempBan- $calc( $2 / 60) Minutes $iif($4 != $null,$chr(123) For Reason: $4- $chr(125),$null)
  .timer 1 $2 .notice $1 You have been unbanned from $3
}
alias tb {
  if (!$2) { halt }
  /ban -ku $+ $2 $chan $1 2 TempBan- $calc( $2 / 60) Minutes $iif($3 != $null,$chr(123) For Reason: $3- $chr(125),$null)
  .timer 1 $2 .notice $1 You have been unbanned from $chan
}