js TIMER

<span id="timer">10</span>
<script>
setInterval(function(){TIMER();},1000);
var s=10;
function TIMER(){
if(!s)document.location.href = '/';
document.getElementById('timer').innerHTML=s;
s--;
}
///

$('[data-file]').click(function(elobj){
var timer=60;


var intervalID=setInterval(function(){
if(timer--){
setFText(timer);
}else{

clearInterval(intervalID);//останов
}
},100);
});
</script>