function display_c(start){
window.start = parseFloat(start);
var end = 0 // change this to stop the counter at a higher value
var refresh=1000; // Refresh rate in milli seconds
if(window.start >= end ){
mytime=setTimeout('display_ct()',refresh)
}
else {alert("Time Over ");}
}

function display_ct() {
// Calculate the number of days left
var days=Math.floor(window.start / 86400);
// After deducting the days calculate the number of hours left
var hours = Math.floor((window.start - (days * 86400 ))/3600)
// After days and hours , how many minutes are left
var minutes = Math.floor((window.start - (days * 86400 ) - (hours *3600 ))/60)
// Finally how many seconds left after removing days, hours and minutes.
var secs = Math.floor((window.start - (days * 86400 ) - (hours *3600 ) - (minutes*60)))

var x =  days + "J " + hours + "H " + minutes + "M " + secs + "S" ;


document.getElementById('decompte').innerHTML = x;
window.start= window.start- 1;

tt=display_c(window.start);
}