function tempo(speed, size) {

var tmpo;
var novo;
var horas;
var mins;
var sec_f;
var secs;
var text;




size = size/1024
speed = parseInt(speed);

if(isNaN(speed)) { speed=256; }
if(speed<=0) { speed=256; }

tmpo = size / (speed / 8);
tmpo = Math.round(tmpo);
horas = tmpo / 3600;
horas = Math.floor(horas);

if(horas >= 1) {
        novo = horas;
        sec_f = tmpo % 3600;
        if(sec_f > 60) {
                mins= sec_f / 60;
                mins = Math.floor(mins);
                novo = novo + ':' + mins;
                secs= sec_f % 60;
                novo = novo + ':' + secs;
         }else{
                mins = 0;
                novo = novo + ':' + mins;
                secs = sec_f;
                novo = novo + ':' + secs;
         }
}else{
         mins= tmpo / 60;
         mins = Math.floor(mins);
         if(mins >= 1) {
            novo = '00:' + mins;
            secs = tmpo % 60;
            if(secs < 10) {
                secs = '0' + secs;
            }
            novo = novo + ':' + secs;
         }
         else {
            secs = tmpo % 60;
            if(secs == '00') {
            secs = '01';
            }
            novo = '00:00:' + secs;
         }
}

if(horas > 0) { horas = horas + 'h ';} else { horas ='';}
if(mins > 0) { mins = mins + 'min ';} else { mins ='';}
if(secs > 0) { secs = secs + 's';} else { secs ='';}

if(speed>=1000) { text = 'Mbps'; speed = Math.floor(speed/1000); } else { text ='Kbps';}

document.getElementById("tempo").innerHTML = horas + mins + secs;
document.getElementById("velo").innerHTML = ' a ' + speed + ' ' + text;

}

function tmpdow(size) {
 var velo = document.getElementById('user_speed').value;
 tempo(velo,size);
}