on ^*:QUIT:{
var %quit $1-

there you get a variable called "quit", then you can use $len(%quit), and if %quit is longer then lets say 5 haltdef = dosent show, else show.
Code:
on ^*:QUIT:{
  var %quit $1-
 var %length $len(%quit)
if (%length => 5) { haltdef }
else {
}
}

untested so dosent know if it work wink but try it and edit it, shouldent be that hard to get it to work as u want..