Run a JS method before / after every AJAX call

I'm using AJAX.NET including update panels, web service calls, client controls etc.

In may page I include 3rd party javascript file that makes keep-alive call for limited preconfigured amount of time (say 30 min). this script is my session keeper.

every time the user have an interaction with the browser - i want to run a method in this script to reset the counter for new 30 min.

Is there a place that is prior / later to all my ajax calls where i can put this method call instead doing that ever开发者_运维问答ywhere dozens of times?

Thanks.

I'm not sure if there is a way to catch every ajax call, but the handler below will fire after every asynchronous postback(eg updatepanel)

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler)

More info here: http://msdn.microsoft.com/en-us/library/bb383810.aspx

As Chaotic_one mentioned, jQuery does have the concept of global events that fire before/after every ajax call, but I think that only refers to calls made using jQuery.

Well, you have to bind your AJAXing function to every browser event. Here is more about JS events. If you use jQuery, events will become much simplier.

But what I didn't get is why just don't make use of .NET Session class?