var myLotHour = 24;
var myLotMin = 48;
var myLotSec = 12;
function myLotNum(myVal) { 
	var res = "" + myVal;
	if(myVal<10) res = "0"+myVal;
	return res;
}
function myTick() {
	myLotSec--;
	if(myLotSec < 0) {
		myLotSec = 59;
		myLotMin--;
		if(myLotMin < 0) {
			myLotMin = 59;
			myLotHour--;
		}
	}
	if(myLotHour<0) {
		myLotHour = 0;
		myLotMin = 0;
		myLotSec = 0;
	} else {
		setTimeout("myTick()",1000);
	}
	document.getElementById("myhour").innerHTML = myLotNum(myLotHour);
	document.getElementById("myminute").innerHTML = myLotNum(myLotMin);
	document.getElementById("mysec").innerHTML = myLotNum(myLotSec);
}
setTimeout("myTick()",1000);