Ciao,

prova cosi


<script>
// VARIABILI NECESSARIE
var tot_secondi=10;
function avvia(){
avanzamento=setInterval('avanza()',(tot_secondi*10 ));
}
a=1;
function avanza(){
if(a < 101){
document.getElementById("div").innerHTML=a+"%";
document.getElementById("div").style.backgroundPos ition="-"+(100-a)+"px";
document.getElementById("div1").innerHTML=a+"%";
document.getElementById("div1").style.backgroundPo sition="-"+(100-a)+"px";
++a;
}else{
clearInterval(avanzamento);
}
}
</script>

</head>



<div align="center" style="background-color:white;padding:3px">
<body onload="avvia();">
<div class="progress">
<span id="div" style="background-position:-100px 0">0%</span>
</div>
<div class="progress">
<span id="div1" style="background-position:-100px 0">0%</span>
</div>


Massimo