Flex的Trim函数

public function LTrim(s : String):String
{
  var i : Number = 0;
  while(s.charCodeAt(i) == 32 || s.charCodeAt(i) == 13 || s.charCodeAt(i) == 10 || s.charCodeAt(i) == 9)
  {
    i++;
  }
  return s.substring(i,s.length);
}
 
public function RTrim(s : String):String
{
  var i : Number = s.length - 1;
  while(s.charCodeAt(i) == 32 || s.charCodeAt(i) == 13 || s.charCodeAt(i) == 10 ||s.charCodeAt(i) == 9)
  {
    i--;
  } 
  return s.substring(0,i+1);
}
 
public function Trim(s : String):String
{
  return LTrim(RTrim(s));
}