Total days since 1 Jan 2000

	// returns total amount of the days that passed since Jan 1 2000
	function getDay(aDate) {
		if (typeof aDate === "string") {
			aDate = new Date(aDate);
		}

		var zeroYear = 2000;
		var totalYears = aDate.getFullYear() - zeroYear;
		// calculate all days that passed 
		// since Jan 1 2000 till current time
		var leapYear;
		var daysInMonth;
		var day = 0;
		for (var j = 0; j < totalYears + 1; j++) {
			// is current year leap
			leapYear = ((j + zeroYear) % 4 == 0);
			// total month in current year
			var totalMonth = (j == totalYears) ? aDate.getMonth() : 11;
			for (var i = 1, l = totalMonth + 1; i <= l; i++) {
				if ((j == totalYears) && (i == l)) {
					day += aDate.getDate();
				} else {
					day += getDaysByMonth(i, leapYear);
				}
			}
		}
		return day;
	};