ASP.NET - Javascript timeOut Warning based on sessionState timeOut in web.config

Question

Problem: I am looking to create a time-out warning message on an asp.net page with a c# code behind based off my webconfig sessionState TimeOut Attribute.

Code on w

Answer 1

I was not able to get FishbasketGordo's code to work because the Web Method call kept passing the Boolean value "false" as the onsuccess method. After much research I made the following changes.

            $(function () {
                var isTimeout = false;
                var callback = function (isTimeout) {
                    if (isTimeout) {
                        // Show your pop-up here...
                        alert("You have timed out");
                    }
                };

                var failure = function () {
                    alert("Problem with Server");
                };

                setInterval(
                        function () {
                            // Don't forget to set EnablePageMethods="true" on your ScriptManager.
                            PageMethods.HasSessionTimedOut(callback,failure);
                        }, 30000
                );
            });