Alpha Idea

//triml();
triml = function () {
  for (var i = 0; i < this.length; i++) {
    if (this.charcodeat (i) > 32) {
      return this.substr (i, this.length);
    }
  }
  return this;
}
 
//trimr();
trimr = function () {
  for (var i = this.length; i > 0; i--) {
    if (this.charcodeat (i) > 32) {
    return this.substring (0, i + 1);
    }
  }
  return this;
}
 
//trimwhite();
trimwhite = function() {
  this = this.triml ();
  return this.trimr ();
}
 
//replace();
function replace():string {
  var str:string = string(arguments[0]);
  var re_str:string = string(arguments[1]);
  var new_str:string = string(arguments[2]);
  if (arguments.length<3||re_str=="") {
    return str;
  }
  while (str.indexof(re_str) != -1 && str != "") {
    str_b = str.indexof(re_str);
    str_e = str_b+re_str.length-1;
    if (str_b != 0 && str_e != str.length-1) {
      str = str.substr(0, str_b)+new_str+str.substr(str_e+1, str.length-1);
    } else if (str_b == 0) {
      str = new_str+str.substr(str_e+1, str.length-1);
    } else {
      str = str.substr(0, str_b)+new_str;
    }
  }
  return str;
}