How to Convert Milliseconds to Date in JS?

Question

My scenario is to convert the data of milliseconds to a date format. I have tried a lot as here http://jsbin.com/jeququ/1/ but it is only working for a limited milliseconds value, and fails if the value is high. I am looking to replicate the functionality as http://www.ruddwire.com/handy-code/date-to-millisecond-calculators/#.VJAp9lWUe1R

Milliseconds Since : Thu Jan 01 1970 05:30:00 GMT+0530

Answer 1

var d = new Date(+milliseconds);

Answer 2

This should work:

var d = new Date(milliseconds);