Recursive timer by using setTimeout

We need to execute a function or code block at a fixed interval to carry out some routine work. Here we need a triggering function which will start the required function at a definite time gap. To do this we will use our setTimeout function. setTimeout JavaScript built in function we will use inside a user defined function and we will call the same function within it to make it recursive. We will be using one alert to display a message at every interval.

Here is the demo of recursive timer

Here is the code. 

<html>
<head>

<script type="text/javascript">

function disp(){
alert("Hello");
}

function timer(){
disp();
setTimeout('timer()',5000);
}

</script>

</head>
<body onLoad="timer();">

</body>
</html>

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