​

        var startTime = new Date() / 1000;

​

        $(document).ready(function () {

            setTimeout(updateClock, 1000);

        });

        function updateClock() {

            var timeField = $(".timeSince");

            var currentTime = new Date();

            var difference =   currentTime- startTime;

            timeField.html(MillisecondsToDuration(difference));

            setTimeout(updateClock, 1000);

        }

        function MillisecondsToDuration(n) {                 

            var hms = "";                    

​

            var dtm = new Date();                 

            dtm.setTime(n);              

            var h = "000" + Math.floor(n / 3600000);     

            var m = "0" + dtm.getMinutes();         

            var s = "0" + dtm.getSeconds();        

​

​

            hms = h.substr(h.length-4) + " hours, " + m.substr(m.length-2) + " mins, ";                

            hms += s.substr(s.length-2) + " secs";

            return hms;              

        } 

​

​

var DATE1 = new Date(1389775451)/1000; 

var DATE2 = (new Date).getTime(); 

var START_DATE = DATE2 - DATE1; // put in the starting date here

var INTERVAL = 1; // in seconds

var INCREMENT = 1; // increase per tick

var START_VALUE = 9001; // initial value when it's the start date

var count = 0;

​

window.onload = function()

{

 var msInterval = INTERVAL * 1000;

 var now = new Date();

 count = parseInt((now - START_DATE)/msInterval) * INCREMENT + START_VALUE;

 document.getElementById('counter').innerHTML = count;

 setInterval("count += INCREMENT; document.getElementById('counter').innerHTML = count;", msInterval);

}