JS | Timestamp in local time as "YYYYMMDD hh:mm:ss:mss"

function(){
// https://stackoverflow.com/a/10088053
// create Date object for current location
var d = new Date();
// convert to msec
// add local time zone offset
// get UTC time in msec
var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
// create new Date object for different city
// using supplied offset
// var nd = new Date(utc - 14400000); // 3600000 * -4, which is EST offset
var nd = new Date(utc - 28800000 ) // 3600000 * -8, which is PDT offest
var yyyy = nd.getFullYear();
var mm = nd.getMonth()+1; // getMonth() is zero-based
      mm = mm < 10 ? "0"+mm : mm;
var dd = nd.getDate();
var hh = nd.getHours() < 10 ? "0"+nd.getHours() : nd.getHours();
var mn = nd.getMinutes() < 10 ? "0"+nd.getMinutes() : nd.getMinutes();
var ss = nd.getSeconds() < 10 ? "0"+nd.getSeconds() : nd.getSeconds();
var ms = nd.getMilliseconds() < 10 ? "00"+nd.getMilliseconds() : nd.getMilliseconds() < 100 ? "0"+nd.getMilliseconds() : nd.getMilliseconds();
var estTimestamp = yyyy + "" + mm + "" + dd + " " + hh + ":" + mn + ":" + ss + ":" + ms;
return estTimestamp;
}