understanding php code and Call javascript function once in 24hours

Question

I came accross following code:

<script type="text/javascript">
        var timeoutId;
        var intervalId;

        function doIt(){
            $("#main").load("refresh.php");
        }
        $(document).ready(function(){
            timeoutId = setTimeout(function(){
                doIt();
                intervalId = setInterval(function(){
                    doIt();
                }, 5000); //Request the doIt() method every 5ms.
            }, 3000); //Delay calculated on the server to trigger the function at the appropriate time
        }); 
    </script>  

1. Rather then calling every 5 second is there any way to call it at 8am everyday in the morning?

2. $("#main").load("refresh.php"); will load the result from refresh.php page on div with id main right?

Answer 1

You'll have to keep the browser up all the time, because javascript is a client side language.

Instead use Cron Job , to schedule tasks.

Answer 2

You don't need to call it every morning at 8 AM.

If the browser is open at 8 AM, just make a call to server to get the latest data.

You can use the getHours() method of date object and check the time. At 8 AM, refresh the data.