using the day of the year for Auto ID

// some time constants based on millisecondsvar fSec = 1000; // milliseconds in a secondvar fMin = fSec * 60; // milliseconds in a minutevar fHr = fMin * 60; // number of milliseconds in an hourvar fDay = fHr * 24; // number of milliseconds in a day//// get the JavaScript DateTime object for nowvar oNow = new Date();// split some data from the objectvar sFullYear = oNow.getFullYear(); // get 4 digit yearvar sMonth = oNow.getMonth(); // get zero based month: January = 0var sDate = oNow.getDate(); // get date of monthvar sDay = oNow.getDay(); // get zero based day of week: Sunday = 0var sTimeZoneOffset = oNow.getTimezoneOffset(); // get the local time zone offset in minutes//// display some the valuesconsole.println('oNow = ' + oNow);console.println('Year = ' + sFullYear);console.println('Month = ' + sMonth);console.println('Date = ' + sDate);console.println('Day = ' + sDay);console.println('Local Time Zone Offset in minutes = ' + sTimezoneOffset);console.println('Local Time Zone Offset in hours = ' + (sTimezoneOffset / 60));// convert Now to start of dayoToday = new Date(sFullYear, sMonth, sDate);console.println('Start of today: ' + oToday);//// create date time object for Jan 1 of current year from year, month and dayvar oNewYear = new Date(sFullYear, 0, 1);console.println('Jan 1 for this year: ' + oNewYear);//// OK let's now do the mathvar fNewYear = oNewYear.valueOf(); // get milliseconds since Epoch for start of yearvar fToday = oToday.valueOf(); // get milliseconds since Epoch for todayvar fDiff = fToday - fNewYear; // get difference between the dates in millisecondsvar fDayYear = fDiff / fDay; // convert millisecond of year to day of year: zero basedfDayYear = fDayYear + 1; // adjust to non-zero day baseconsole.println('Day of Year for today: ' + fDayYear);