onbeforeunload

I'm struggling with onbeforeunload, onunload and generating the right messages at the right time. Any idea welcome. This is the situation: when I use onbeforeunload, the user gets a message to choose whether to navigate away, but I can't turn it off - the message is standard and appears regardless what's in the event handler. when I use onunload, I can control the "bye" messages that occur, but I cant offer the user the opportunity to change their mind. So for example, if there is data to save. With onbeforeunload, a message pops up, -regardless of the state of the user's data- asking if they

Background: I'm creating a very simple chatroom-like ASP.NET page with C# Code-Behind. The current users/chat messages are displayed in Controls located within an AJAX Update Panel, and using a Timer - they pull information from a DB every few seconds. I'm trying to find a simple way to handle setting a User's status to "Offline" when they exit their browser as opposed to hitting the "Logoff" button. The "Offline" status is currently just a 1 char (y/n) for IsOnline. So far I have looked into window.onbeforeunload with Javascript, setting a hidden form variable with a function on this event ->

I wonder if there is a anyway to remove the WebBrowser Message are you sure you want to navigate away from this page When I try to navigate another url, it happens. I tried this methods e.Cancel = False WebBrowser1.Dispose() WebBrowser1 = New WebBrowser WebBrowser1.ScriptErrorsSuppressed = True WebBrowser1.Navigate(New Uri("https://www.google.com")) That is coded into the website, so you'd have to inject some Javascript into the page to override the prompt. Be careful with this, though. This requires overriding the entire window.onbeforeunload event handler , and some pages might have decided

I'm trying to handle some logic on before unload and I don't want that logic to run if the user is reloading the page or going back. I've set up something like this. window.onbeforeunload = function(e) { if(window.event && window.event.clientX){ //IE //some logic } else if (e.currentTarget.performance.navigation.type === e.currentTarget.performance.navigation.TYPE_RELOAD) { // another logic } else if(e.currentTarget.performance.navigation.type === e.currentTarget.performance.navigation.TYPE_BACK_FORWARD){ // yet another logic } } I have other code to handle refresh and such from keyboard input