ВНИМАНИЕ!!!!

<span id="uClock">$TIME$</span>  
<script type="text/javascript">  
// By AllCity ~ http://allcity.net.ru/  
function clock_from(hour,min,sec){  
clock="";  
if(sec>59){sec=0;min=min+1;}  
if(min>59){min=0;hour=hour+1;}  
if(hour>23){hour=0;}  
if(hour<10){clock+="0"+hour;}else{clock+=""+hour;}  
clock+=":";  
if(min<10){clock+="0"+min;}else{clock+=""+min;}  
clock+=":";  
if(sec<10){clock+="0"+sec;}else{clock+=""+sec;}  
elem=document.getElementById('uClock');  
elem.innerHTML=clock;  
setTimeout("clock_from("+hour+","+min+","+(sec+1)+")",1000);}  
clock_from(parseInt(document.getElementById('uClock').innerHTML.split(':')[0]),parseInt(document.getElementById('uClock').innerHTML.split(':')[1]),parseInt(document.getElementById('uClock').innerHTML.split(':')[2]));  
</script>