function stripBeginEndWhithespace(p_string:String):String
{
  var pattern:RegExp = new RegExp("^[ \t
]+|[ \t
]+$","g");
  p_string = p_string.replace(pattern, "");
  return p_string;
}

This can be useful when you retrieve strings from an XML or script that have whitespaces at the beginning or the end.

Strip whitespace at the beginning and the end of a string

regexp

ActionScript 3