1function calculateDaysBetweenDates(date1, date2) {
2 var oneDay = 24 * 60 * 60 * 1000;
3 var date1InMillis = date1.getTime();
4 var date2InMillis = date2.getTime();
5 var days = Math.round(Math.abs(date2InMillis - date1InMillis) / oneDay);
6 return days;
7}