Nodejs Utililty Methods String Format

Date.prototype.toFormattedString = function(include_time){
  str = this.getFullYear() + "-" + Date.padded2(this.getMonth() + 1) + "-" +Date.padded2(this.getDate());
if (include_time) { hour=this.getHours(); str += " " + this.getAMPMHour() + ":" + this.getPaddedMinutes() + " " + this.getAMPM() }
return str;
Date.parseFormattedString = function (string) {
  var regexp = "([0-9]{4})(-([0-9]{2})(-([0-9]{2})" +
      "( ([0-9]{1,2}):([0-9]{2})? *(pm|am)" +
      "?)?)?)?";
...

Date.prototype.toFormattedString = function(include_time){
  str = Date.padded2(this.getMonth() + 1) + '/' + Date.padded2(this.getDate()) + '/' + this.getFullYear();
  if (include_time) { hour=this.getHours(); str += " " + this.getAMPMHour() + ":" + this.getPaddedMinutes() + " " + this.getAMPM() }
  return str;
Date.parseFormattedString = function (string) {
  var regexp = "(([0-1]?[0-9])\/[0-3]?[0-9]\/[0-9]{4}) *([0-9]{1,2}(:[0-9]{2})? *(am|pm))?";
  var d = string.match(new RegExp(regexp, "i"));
  if (d==null) {
...

Date.prototype.toFormattedString=function(t){
  return str=Date.padded2(this.getDate())+" "+Date.months[this.getMonth()]+" "+this.getFullYear(),t&&(str+=" "+this.getHours()+":"+this.getPaddedMinutes()),str};