남은 날짜 초 단위 텍스트 카운터

2020 년은<br><br><span id="COUNTER">^_^</span><br><br>
2020 원더키디라는 만화를 재미있게 보던 시절이 있었는데... 어느덧 2020년이 -_- 멀지 않은듯..

<script language="JavaScript">
<!--
	var now = new Date()
	var then = new Date('january 1,2020') // 날짜를 설정해 주세요
	var Total_sec = Math.floor((then.getTime() - now.getTime()) / 1000)
	
	function Day_counter(){
		Remain_days = Math.floor(Total_sec / 86400)
		Remain_tot_sec = Total_sec - 86400 * Remain_days
		Remain_hour = Math.floor(Remain_tot_sec / 3600)
		tmp = Remain_tot_sec - Remain_hour * 3600
		Remain_minute = Math.floor(tmp / 60)
		Remain_sec = Math.floor(tmp % 60)
		
		if(Remain_days <= 0)Remain_days = ''
		else Remain_days = Remain_days + '일 '
		if(Remain_sec < 10)Remain_sec = '0' + Remain_sec
		if(Remain_minute < 10)Remain_minute = '0' + Remain_minute
		if(Remain_hour <= 0)Remain_hour = ''
		else Remain_hour = Remain_hour + '시간 '
		
		document.getElementById('COUNTER').innerHTML = Remain_days + Remain_hour + Remain_minute + '분 ' + Remain_sec + '초 남았습니다.'
		Total_sec--
	}
	
	if(Total_sec > 0){
		Day_counter()
		setInterval("Day_counter()",1000)
	}else document.getElementById('COUNTER').innerHTML = '지나 갔네요. ㅎㅎ'
//-->
</script>