today = new Date();
thismon = today.getMonth();
thisday = today.getDate();
thisyr = today.getFullYear();
if (thismon == 11 && thisday > 25)
	{
	thisyr = ++thisyr;
	BigDay = new Date("December 25, "+thisyr);
	}
else
	{
	BigDay = new Date("December 25, "+thisyr);
	}

msPerDay = 24 * 60 * 60 * 1000 ;
timeLeft = (BigDay.getTime() - today.getTime());
e_daysLeft = timeLeft / msPerDay;
daysLeft = Math.floor(e_daysLeft);
e_hrsLeft = (e_daysLeft - daysLeft)*24;
hrsLeft = Math.floor(e_hrsLeft);
minsLeft = Math.floor((e_hrsLeft - hrsLeft)*60);
document.write( "There's only "+daysLeft+" days, "+hrsLeft+" hours and "+minsLeft+" minutes left until Christmas!");