CODEWITHSUNDEEP
javascriptajax
user2998616
user2998616

Reputation: 31

How to call JS function continuously after every 5 seconds

I have following codes:

JSP code is as follows:

<html>
<head>
<script src="js/nextprevpage.js" type="text/javascript"></script>
</head>

<body onload="javascript:first();">

<div id="getData">

</div>

</body>
</html>

Code present in nextprevpage.js is as follows:

function first()
{

var xmlhttp;
if (window.XMLHttpRequest) 
{       // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp = new XMLHttpRequest();
} 
else 
{   // code for IE6, IE5
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() 
{
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) 
    {
        document.getElementById("getData").innerHTML= xmlhttp.responseText;
    }
}
  // here you make a request to your script to check your database...
xmlhttp.open("POST", "updatesession.jsp?", true);
xmlhttp.send();
}

Now I have another jsp page as updatesession.jsp.

<html>
<head>

</head>

<body ">
 Hello......
</body>
</html>

I called above js function using onload() event. I need to call this js function continuously. Is there any way to call this function every after 5 seconds.

Upvotes: 1

Views: 13701

Answers (7)

Sathiyaraj
Sathiyaraj

Reputation: 343

function first(){
    /*
        write your AJAX code
    */
    window.setInterval(first, 10000);

    first()  // function recursion logic call  
}

This logic will run every interval to call AJAX send operation

Upvotes: -1

Krish R
Krish R

Reputation: 22721

You can use setInterval()

Syntax: window.setInterval(func, delay); 

 function first(){

  ....
   xmlhttp.send();
  window.setInterval(first, 10000);
 }

Upvotes: 6

Dheer
Dheer

Reputation: 793

You can use JavaScript Timing Events http://www.w3schools.com/js/js_timing.asp to call js function after certain interval of time.

You can do like this:

setInterval(function(){alert("Hello")},3000);

Upvotes: 0

earthmover
earthmover

Reputation: 4525

Put your method into:

window.setInterval(yourfunction(){},time_in_millis);

Demo

Upvotes: 0

btafarelo
btafarelo

Reputation: 627

Use setinterval function

w3schools setinterval

Upvotes: 0

Pieter De Schepper
Pieter De Schepper

Reputation: 476

You need to use window.setInterval for this. Check http://www.w3schools.com/js/js_timing.asp

window.setInterval("first", 5000);

Upvotes: 1

RaviH
RaviH

Reputation: 3584

Use window.setInterval function to keep calling a function repeatedly.

Upvotes: 3

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