Dynamic Clock on homepage with Javascript

This little piece of Javascript, simply takes the computer-clock, and shows it in the desired format, size and font...
This script is on every pages on my website, so that visitors can view the clock at any time... (Look down in the right corner).
The smart thing about this script, is that the seconds also changes (every second :-), and with a little editing, the script can be used as countdown or for managing the time elsehow...

Here is the javascript to be included between <head> and </head>:

<script type="text/javascript">
function UR_Start() 
{
	UR_Nu = new Date;
	UR_Indhold = showFilled(UR_Nu.getHours()) + ":" + showFilled(UR_Nu.getMinutes()) + ":" + showFilled(UR_Nu.getSeconds());
	document.getElementById("ur").innerHTML = UR_Indhold;
	setTimeout("UR_Start()",1000);
}
function showFilled(Value) 
{
	return (Value > 9) ? "" + Value : "0" + Value;
}

</script>

Include this html code in the desired position on the webpage, where you want the clock to be shown:
- Notice that you can easily change the font, size and color...