var s="0";
var m="0";
var h="0";
function stop(){
clearInterval(hours);
clearInterval(minutes);
clearInterval(seconds);
}
function timer(){
var seconds=seconds.setInterval("seconds()",1000);
var minutes=minutes.setInterval("minutes()",60000);
var hours=hours.setInterval("hours()",3600000);
}
if(s<0)
{
document.getElementById('timer').innerHTML=s +" seconds";
}
if(m>0)
{
document.getElementById('timer').innerHTML=m +" minutes" +s +" seconds";
}
else if(h>0)
{
document.getElementById('timer').innerHTML=h +" hours" +m +" minutes" +s +" seconds";
}
}
function seconds(){
s++;
}
function minutes(){
m++;
}
function hours(){
h++;
}