<div> Current Time 
	<span id="clock"></span>
</div>

window.onload = function(){

function showClock(){
	var time = new Date();
	var hour = time.getHours();
	var minute = time.getMinutes();
	var sec = time.getSeconds();
	var timeFormatter = digitFormatter(hour)+':'+digitFormatter(minute)+':'+digitFormatter(sec);
	var clock = document.getElementById("clock");

	
	clock.textContent = timeFormatter;
}

function digitFormatter(num){
	if(num<10){
		return '0'+num;
	}else{
		return num;
	}
}
showClock();
setInterval(showClock,1000)
}