codice:
Aggiornamento tra: <span id="d2" style="border:0; font-size:36px; font-family:'Times New Roman', Times, serif; margin:0px; padding:0px;">30</span> secondi 
--> 
<script>
<!-- 
// 
 var milisec=0 
 var seconds=30 
 // document.counter.d2.value='30' 


function display(){
 if(milisec==0&&seconds==0)
    window.location.reload();
 if (milisec<=0){ 
    milisec=9 
    seconds-=1 
 } 
 if (seconds<=-1){ 
    milisec=0 
    seconds+=1 
 } 
 else 
    milisec-=1 
    document.getElementById('d2').innerHTML = seconds+"."+milisec 
    setTimeout("display()",100) 
} 
display() 
--> 
</script>
saluti