Javascript window close event rather than unload event for all browsers

Question

I want to alert a user while the user tries to close the browser with out siginingoff or without saving some settings.

I am ding unload option in another page to ale

Answer 1

The Mozilla documentation indicates that you should set the event.returnValue instead of simply returning a string:

window.onbeforeunload = confirmExit;
function confirmExit(e){
    if(readCookie("onlineVD") == "playing" && Confirm_Delete=="0")
    {
        var msg = "You are leaving a video which is in play mode.Are you sure want to exit this page?";
        if (e) {
            e.returnValue = msg;
        }

        return msg;
    }
    else{
        Confirm_Delete="0";
    }
}