Question

<div> refresh automatically after every 15 minutes javascript, ajax

Asked by: Saroj13

Hi,

I have a div tag in which  I am displaying some data. On Page Load, I am calling the function that displays data in <div>. What I want is every 15 minutes, <div> tag refreshes so that it will display new daya. I am using AJAX and javascript.

Would you please se the below code in javascript and ajax. Please make chnages in the below code, so that it will refresh <div> automaticallly.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 
<script type="text/javascript" language="javascript">
 
var oXMLDOM = new ActiveXObject("Microsoft.XMLDOM");
var myReq = (window.XMLHttpRequest)? new XMLHttpRequest(): new ActiveXObject("MSXML2.XMLHTTP");
 
function makeRequest()
{
	var sUrl= "http://myurl"
 
    	myReq.onreadystatechange = onXMLResponse;
		myReq.open("POST", sUrl, true); 
		myReq.setRequestHeader("Content-Type", "text/xml");
		myReq.send();
}
 
function onXMLResponse()
{
    if(myReq.readyState == 4)
		{
    		document.getElementById('Msg').innerHTML = myReq.responseText;
		}
}
 
window.onload=function()
{
	makeRequest();
}
 
</script>
 
</head>
 
<body>
     <div id="Msg">
     </div>
 
</body>
</html>

                                  
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Asked On
2009-03-26 at 13:22:14ID24269006
Tags

<div> refresh every 15 minutes javascript

,

ajax

Topics

JavaScript

,

Asynchronous Javascript and XML (AJAX)

Participating Experts
2
Points
500
Comments
12

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Answers

 

by: asianandrewPosted on 2009-03-26 at 13:28:20ID: 23994868

I'd recommend using Prototype JS and using the Periodic Updater - http://www.prototypejs.org/api/ajax/periodicalUpdater

Once you include prototype.js in your head, you should be able to use the following code.

new Ajax.PeriodicalUpdater('Msg', "http://myurl", { frequency: 900 });
                                              
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by: MorcalavinPosted on 2009-03-26 at 13:30:08ID: 23994892

If all you are doing is reading the data, why are you using POST?  Use GET instead.  Anyway, you can use the setInterval function to run the makeRequest  function every 15 minutes.

window.setInterval(makeRequest, 900000);

                                              
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by: Saroj13Posted on 2009-03-26 at 13:30:28ID: 23994896

Hi asianandrew:

I will include the prototype.js.
would you please tell me where to add new Ajax.PeriodicalUpdater('Msg', "http://myurl", { frequency: 900 }); in the code???

Thanks

 

by: Saroj13Posted on 2009-03-26 at 13:31:52ID: 23994915

Hi Morcalavin,

Where to put  this function in the code. window.setInterval(makeRequest, 900000);

I want that page load displays data immediately and then every 15 minutes div tag refreshes automatically

 

by: asianandrewPosted on 2009-03-26 at 13:34:20ID: 23994947

you can put it in your window.onload function (line 30)

window.onload=function()
{
  new Ajax.PeriodicalUpdater('Msg', "http://myurl", { frequency: 900 });
}

                                              
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by: MorcalavinPosted on 2009-03-26 at 13:35:04ID: 23994959

Put the code in your window.onload function

 

by: Saroj13Posted on 2009-03-26 at 13:47:50ID: 23995109

Hi asianandrew,

I have included this script file
 <script src="js/prototype-1.6.0.3.js" type="text/javascript"></script>

Also, below is my code:
window.onload=function()
{
    new Ajax.PeriodicalUpdater('Msg', "http://myurl", { frequency: 60 });
}

Its not doing anything

 

by: Saroj13Posted on 2009-03-26 at 13:51:00ID: 23995139

Hi Morcalavin,

window.setInterval(makeRequest, 900000); is working fine.

PROBLEM: I want data to display immediately on page load
and then refresh every 15 minutes.

 

by: MorcalavinPosted on 2009-03-26 at 13:52:38ID: 23995158

window.onload = function() {
makeRequest();
window.setInterval(makeRequest, 900000)
};

 

by: asianandrewPosted on 2009-03-26 at 13:54:21ID: 23995183

Since Morcalavin's solution is working, just call makeRequest() in the window.onload function in addtion to the window.setInterval

 

by: Saroj13Posted on 2009-03-26 at 14:09:44ID: 23995347

Hi Morcalavin,

Even window.onload = function() {
makeRequest();
window.setInterval(makeRequest, 900000)
};
 is not working. Its not refreshing the <div> tag automatically after 15 minutes.

 

by: Saroj13Posted on 2009-03-26 at 15:24:24ID: 23996207

Hi asianandrew,

I have tried your solution. Your solution do run every 1 minute, but it gives me an error after 1minute. I have included the complete code again. Please fix my code..

The HTTP verb POST used to access path '/Ajax/makeRequest();' is not allowed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: The HTTP verb POST used to access path '/Ajax/makeRequest();' is not allowed.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 
<script type="text/javascript" language="javascript">
 
<script type="text/javascript" language="javascript">
 
var oXMLDOM = new ActiveXObject("Microsoft.XMLDOM");
var myReq = (window.XMLHttpRequest)? new XMLHttpRequest(): new ActiveXObject("MSXML2.XMLHTTP");
 
var strSoapRequest = "<?xml version='1.0' ?>";
	strSoapRequest += "<SOAP-ENV:Envelope xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/'>";
	strSoapRequest += "<SOAP-ENV:Body>";
	strSoapRequest += "<idc:service xmlns:idc='http://www.nsu.com/IdcService/' IdcService='GET_DOCS'>";
	strSoapRequest += "<idc:document>";
	strSoapRequest += "</idc:document>";
	strSoapRequest += "</idc:service>";
	strSoapRequest += "</SOAP-ENV:Body>";
	strSoapRequest += "</SOAP-ENV:Envelope>";
	
function makeRequest()
{
    
	var sUrl= "http://nsu.com/dev1/"
 
		myReq.onreadystatechange = onXMLResponse;
		myReq.open("POST", sUrl, true); 
		myReq.setRequestHeader("Content-Type", "text/xml");
		myReq.send(strSoapRequest);
 
}
 
function onXMLResponse()
{
 
		if(myReq.readyState == 4)
		{
    		document.getElementById(Msg).innerHTML = myReq.responseText;
    	}
}
 
window.onload=function()
{
	makeRequest();
	  new Ajax.PeriodicalUpdater('Msg', "makeRequest();", { frequency: 60 });
 
}
 
</script>
 
</head>
 
<body>
     <div id="Msg">
     </div>
 
</body>
</html>

                                              
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