JavaScript implements a formatted date_time and date how long it will be from now

/**
*
* Returns a formatted date how long it is from now, such as September 5, 2009 14:15:23
* For example: the current time is September 5, 2009 14:15:23 timeLong=10 seconds then return: September 5, 2009 14:15:33
*
* @param int timeLong a
* @param String formatString YYYY-MM-DD hh :mm:ss
*
*/
function getOneFormatDate(timeLong,formatString)
{
timeLong=parseInt(timeLong);
timeLong=timeLong*1000;
var myDate=new Date();
var futureDate=new Date(parseInt(myDate.getTime()) timeLong);
var year=futureDate.getYear();
var month=futureDate.getMonth();
var day=futureDate.getDate();
var hour=futureDate.getHours();
var minute=futureDate.getMinutes();
var second=futureDate.getSeconds();

if(hour<10)
{
hour="0" hour;
}
if(minute<10)
{
minute="0" minute;
}
if(second<10)
{
second="0" second;
}
formatString=formatString.replace("YYYY",year);
formatString=formatString.replace("MM",month);
formatString=formatString.replace("DD",day);
formatString=formatString.replace("hh",hour);
formatString=formatString.replace("mm",minute);
formatString=formatString.replace("ss",second);
return formatString;
}