date_format.js

//dateFormat(new Date(), '%Y-%m-%d %H:%M:%S');
var dateFormat = function(date, fstr) {
  return fstr.replace (/%[YmdHMS]/g, function (m) {
    switch (m) {
      case '%Y': return date.getFullYear();
      case '%m': m = date.getMonth() + 1; break;
      case '%d': m = date.getDate(); break;
      case '%H': m = date.getHours(); break;
      case '%M': m = date.getMinutes(); break;
      case '%S': m = date.getSeconds(); break;
      default: return m.slice(1);
    }
    // add leading zero if required
    return ('0' + m).slice(-2);
  });
};