Как обновить часть страницы по таймеру

<script language='javascript' type='text/javascript'>  
function fulltime () {  
var time=new Date();  
var newYear=new Date("00,00,00,00:00:00");  - [color=red] вывожу заданную дату и время через дополнительные поля[/color]
var totalRemains=(newYear.getTime()-time.getTime());  

if (totalRemains>1){  

var RemainsSec = (parseInt(totalRemains/1000));  
var RemainsFullDays=(parseInt(RemainsSec/(24*60*60)));  
var secInLastDay=RemainsSec-RemainsFullDays*24*3600;  
var RemainsFullHours=(parseInt(secInLastDay/3600));  
if (RemainsFullHours<10){RemainsFullHours="0"+RemainsFullHours};  
var secInLastHour=secInLastDay-RemainsFullHours*3600;  
var RemainsMinutes=(parseInt(secInLastHour/60));  
if (RemainsMinutes<10){RemainsMinutes="0"+RemainsMinutes};  
var lastSec=secInLastHour-RemainsMinutes*60;  
if (lastSec<10){lastSec="0"+lastSec};  

document.getElementById("RemainsFullDays").innerHTML=RemainsFullDays+"<span id='Rem'> дн</span>";  
document.getElementById("RemainsFullHours").innerHTML=RemainsFullHours+"<span id='Rem'> час</span>";  
document.getElementById("RemainsMinutes").innerHTML=RemainsMinutes+"<span id='Rem'> мин</span>";  
document.getElementById("lastSec").innerHTML=lastSec+"<span id='Rem'> сек</span>";  
setTimeout('fulltime()',10)  
}  

else{  
document.getElementById("clock").innerHTML="[color=blue]AAA[/color]";  - [color=red]тут отображается информация после истечения времени[/color]
}  
}  
</script>  
<style type='text/css'>  
#clou_xs {position:relative;width:250px;height:280px;left:35px;padding:10px;}  
#clock {height:150px;right:60px;font-size:13px;}  
#RemainsFullDays {position:absolute;top:83%;left:32%;font-size:25px;}  
#RemainsFullHours {position:absolute;bottom:1px;left:40px;font-size:15px;}  
#RemainsMinutes {position:absolute;bottom:1px;left:87px;font-size:15px;}  
#lastSec {position:absolute;bottom:1px;left:135px;font-size:15px;}  
#Rem {font-size:11px;font-weight:normal;}  
</style>  
<div id='clou_xs'>  
<div id='clock'>  

[color=blue]BBB[/color] - [color=red]тут отображается информация до истечения времени[/color]

<span id='RemainsFullDays'></span>  
  <span id='RemainsFullHours'></span>  
  <span id='RemainsMinutes'></span>  
  <span id='lastSec'></span>  
</div>  
</div>  
<script language='javascript'>fulltime();</script>