onclick timer javascript
//to repeat a function here, MyTimer at every 1000 ms ie 1 sec use this
var myVar = setInterval(myTimer, 1000);
//replace myTimer with your function, and 1000 with the no of seconds between each function call
// used it run refresh function to refresh a page at 300000ms ie every 5 minutes
//var myVar = setInterval(refreshPage, 300000);
function myTimer() {
var d = new Date();
document.getElementById("demo").innerHTML = d.toLocaleTimeString();
} 
document.getElementById("gameStart").addEventListener("click", function(){
var timeleft = 15;
var downloadTimer = setInterval(function function1(){
document.getElementById("countdown").innerHTML = timeleft +
" "+"seconds remaining";
timeleft -= 1;
if(timeleft <= 0){
clearInterval(downloadTimer);
document.getElementById("countdown").innerHTML = "Time is up!"
}
}, 1000);
console.log(countdown);
});
