Keeping a session alive on ColdFusion using Jquery

Here is a simple solution to keep a session open on forms where users may need an extended period of time for data entry. You can include this code on any page where you need the session extended. You can remove the javascript include if JQuery is included on all of your pages already.
<!— Include this file on any page where users may take a long time filling in text and you want to keep the session open —>
<cfparam name=”variables.refreshrate” default=”60000″>
<cfoutput>
<script type=”text/javascript” src=”/js/jquery-1.3.2.min.js”></script>
<script language=”JavaScript” type=”text/javascript”>
$(document).ready(function(){
setTimeout(“callserver()”,#variables.refreshrate#);
});
function callserver()
{
var remoteURL = ‘/emptypage.cfm’;
$.get(remoteURL, function(data){
setTimeout(“callserver()”,#variables.refreshrate#);
});
}
</script>
</cfoutput>
In the above code the function callserver will get invoked 60 seconds after the data entry page is loaded. The callserver function will keep refreshing the data entry screen at an interval of 60 seconds with all the data that user have entered till the user submits the form.