Javascript Date toLongTimeString()

var padZero = function(n) {
 return n < 10 ? '0' + n: n;
};

Date.prototype.toLongTimeString = function() {
 var h = this.getHours(),
  s = this.getSeconds(),/*from ww w. java 2s. c om*/
  m = this.getMinutes();
 return padZero(h) + ':' + padZero(m) + ':' + padZero(s);  
};