function formatField(num, isHour){
	if (typeof isHour!="undefined"){ //if this is the hour field
		var hour=(num>12)? num-12 : num
		return (hour==0)? 12 : hour
	}
	return (num<=9)? "0"+num : num//if this is minute or sec field
}
function formatDay(day){
	if (day < 10) day = "0" + day;
	return day;
}
function formatMonth(month){
	var mon = month + 1;
	if (mon < 10) mon = "0" + mon;
	return mon;
}