function doClock() {
	var time = new Date();
	var hour = time.getHours();
	var minute = time.getMinutes();
	var second = time.getSeconds();
	
	if(hour < 10) var hour = '0'+hour;
	if(minute < 10) var minute = '0'+minute;
	if(second < 10) var second = '0'+second;
	
	document.getElementById("clock").innerHTML = hour+':'+minute+':'+second;
}
var run_clock = setInterval("doClock()",1000);