[DeliMIter]

String.prototype.rtrim = function() {
  var value = this.toString();
  for (var i=0; i<arguments.length; i++) {
    value = value.split(arguments[i]).join("");
  }
  return(value);
}

suxx = "Bla bla\n Bla!";
trace(suxx.rtrim(" ", "\n"));