Change time interval

Question

How can I change or countdown my time interval? I want to popup "alert" every 5000ms, 4000ms, 3000ms, and so on.

intervall = 5000;

setInterval(function(){

  alert("ALERT");

  interval = interval - 1000;      
},intervall);

Answer 1

Try using setTimeout instead of setInterval.

Like this:

interval = 5000;

setTimeout(function(){

  alert("ALERT");

  interval = interval - 1000;      
},interval);