function odliczanie()
{
czas = new Date();
var godzina=17;
display_c(godzina*3600-(czas.getHours()*3600+czas.getMinutes()*60+czas.getSeconds()));
}
function display_c(start){
window.start = parseFloat(start);
var end = 0 
var refresh=1000; 
if(window.start >= end ){
mytime=setTimeout('display_ct()',refresh)
}
}

function display_ct() {

var days=Math.floor(window.start / 86400);

var hours = Math.floor((window.start - (days * 86400 ))/3600)

var minutes = Math.floor((window.start - (days * 86400 ) - (hours *3600 ))/60)

var secs = Math.floor((window.start - (days * 86400 ) - (hours *3600 ) - (minutes*60)))

if(hours>0)
var x = hours + "h, " + minutes + "min, " + secs + "sek";
else
var x = minutes + "min, " + secs + "sek";

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

tt=display_c(window.start);
}