var nCount_Down_Speed = 1000;  //切換時間
var nCount_Down_Day = 0;
var nCount_Down_Hour = 0;
var nCount_Down_Min = 0;
var nCount_Down_Sec = 0;
var bCount_Down_Running = true;

function count_down_start_time(nTotalSec)
{
	nCount_Down_Day = parseInt(nTotalSec/86400);
	nCount_Down_Hour = parseInt((nTotalSec/3600)%24);
	nCount_Down_Min = parseInt(nTotalSec/60)%60;
	nCount_Down_Sec = parseInt(nTotalSec%60);
	count_down_show_time();
}

function count_down_show_time()
{
	var day1 = parseInt(nCount_Down_Day/100);
	document.getElementById('count_down_day_1').innerHTML = (day1 == 0) ? '' : day1;

	var day2 = parseInt(nCount_Down_Day/10);
	day2 = (day2>=10) ? parseInt(day2/10) : day2;
	document.getElementById('count_down_day_2').innerHTML = (day2 == 0) ? '' : day2;

	document.getElementById('count_down_day_3').innerHTML = parseInt(nCount_Down_Day%10);
	document.getElementById('count_down_hour_1').innerHTML = parseInt(nCount_Down_Hour/10);
	document.getElementById('count_down_hour_2').innerHTML = parseInt(nCount_Down_Hour%10);
	document.getElementById('count_down_min_1').innerHTML = parseInt(nCount_Down_Min/10);
	document.getElementById('count_down_min_2').innerHTML = parseInt(nCount_Down_Min%10);
	document.getElementById('count_down_sec_1').innerHTML = parseInt(nCount_Down_Sec/10);
	document.getElementById('count_down_sec_2').innerHTML = parseInt(nCount_Down_Sec%10);

	nCount_Down_Sec--;
	if(nCount_Down_Sec < 0)
	{
		if ( nCount_Down_Min > 0 || nCount_Down_Hour > 0 || nCount_Down_Day > 0 )
		{
			nCount_Down_Sec = 59;
			nCount_Down_Min--;
			if( nCount_Down_Min < 0 )
			{
				if ( nCount_Down_Hour > 0 || nCount_Down_Day > 0 )
				{
					nCount_Down_Min = 59;
					nCount_Down_Hour--;
					if( nCount_Down_Hour < 0 )
					{
						if ( nCount_Down_Day > 0 )
						{
							nCount_Down_Hour = 23;
							nCount_Down_Day--;
						}
					}
				}
			}
		}
		else if (bCount_Down_Running)
		{
			bCount_Down_Running = false;
		}
	}

	if(bCount_Down_Running)
	{
		setTimeout('count_down_show_time()', nCount_Down_Speed);
	}
}