SetTimeout with standard counter

Question

I want to create a alert \"Hello\" which will show up after 10sec. I used setTimeout and it working fine. Now i would like to do counter(timer) which will show 10, 9, 8,7 ...

Answer 1

Simple variant:

var count=10;

var counter=setInterval(timer, 1000);

function timer()
{
  count=count-1;
  if (count <= 0)
  {
     clearInterval(counter);
      alert("Finished!")
     return;
  }

 document.getElementById("timer").innerHTML=count + " secs"; // watch for spelling
}

Working jsfiddle