[ZoNT]

<script language="JavaScript">  
        function timer(timer,ob)   
        { 
          timer--;
          if(timer<0)timer=0;
          document.getElementById(ob).innerHTML=timer;
          setTimeout('timer('+timer+',"'+ob2+'")',1000)
        }
</script>  
 
<p id="t"></p>
 
<script language="JavaScript">  
    timer(10,'t');
</script>