[ksa]

Подскажите, пожалуйста, что нужно для того, чтобы привести этот таймер в движение

Как вариант...

<div id="clock" style="font-size: 42px;"></div>
<a href="?act=logout">Выход</a> / <a href="?act=reset" id='reset'>Обнулить</a>
<script type="text/javascript">
date2 = new Date ();
function clock_update () {
	date1 = new Date ();
	diff = new Date();

	diff.setTime (date1.getTime() - date2.getTime ());

	timediff = diff.getTime();

	years = Math.floor (timediff / (1000 * 60 * 60 * 24 * 365));
	timediff -= years * (1000 * 60 * 60 * 24 * 365);

	months = Math.floor (timediff / (1000 * 60 * 60 * 24 * 30));
	timediff -= months * (1000 * 60 * 60 * 24 * 30);

	weeks = Math.floor (timediff / (1000 * 60 * 60 * 24 * 7));
	//timediff -= weeks * (1000 * 60 * 60 * 24 * 7);

	days = Math.floor(timediff / (1000 * 60 * 60 * 24));
	timediff -= days * (1000 * 60 * 60 * 24);

	hours = Math.floor(timediff / (1000 * 60 * 60)); 
	timediff -= hours * (1000 * 60 * 60);

	minutes = Math.floor(timediff / (1000 * 60)); 
	timediff -= minutes * (1000 * 60);

	seconds = Math.floor(timediff / 1000);
	timediff -= seconds * 1000;

	if (hours < 10) hours = '0' + hours;
	if (minutes < 10) minutes = '0' + minutes;
	if (seconds < 10) seconds = '0' + seconds;

	document.getElementById ('clock').innerHTML = '';

	if (years>0) document.getElementById ('clock').innerHTML += years + 'г. ';
	if (months>0) document.getElementById ('clock').innerHTML += months + ' м. ';
	if (days>0) document.getElementById ('clock').innerHTML += days + ' д.<br>';

	document.getElementById ('clock').innerHTML += hours + ':' + minutes + ':' + seconds + '';
	document.getElementById ('reset').href = '?act=reset&microtime=' + new Date().getTime();

	hours = parseInt (hours);
	minutes = parseInt (minutes);
	seconds = parseInt (seconds);
}
setInterval ('clock_update ()', 1000);
</script>