jurvrn,
проверяйте
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<span id="txt"></span>
<script type="text/javascript">
function moscowTime() {
var d = new Date();
d.setHours( d.getHours() + 3, d.getMinutes() + d.getTimezoneOffset() );
var reg = d.getSeconds()%2;
var time = d.toTimeString().substring(0,5)
reg && (time = time.replace(':',' '))
return time;
}
onload = function () {
setInterval(function () {
document.getElementById("txt").innerHTML = moscowTime();
}, 100);
}
</script>
</body>
</html>