wicimice

I have a problem, where i need to know when user leave or close tha browser tab. I tryd to make a ajax post, after unload, make a POST into kill_browser.php and after 1 minute when session_expire, php code will be execute and save time into database. But it not seems to work :/ I'm glad if some 1 can say what im doing wrong, or is there eny better way to detect it. @home.php var leaved = 'leaved'; $(window).unload( function(){ $.ajax({ url: 'kill_browser.php', global: false, type: 'POST', data: leaved, async: false, success: function() { console.log('leaved'); } }); }); @kill_browser.php <?php require('class/connection.php'); $conn = new connection(); session_cache_limiter('private'); $cache_limiter = session_cache_limiter(); session_cache_expire(1); $cache_expire = session_cache_expire(); session_start(); $_SESSION['leaved'] = $_POST['leaved']; if($_SESSION['leaved'] == null || $_SESSION['leaved'] == " "){ $conn->logOut($_SESSION['userID'], $_SESSION['userIP'], $_SESSION['LAST_GENERATED_ID']); session_regenerate_id(true); unset($_SESSION); session_destroy(); header('location:index.php'); } ?>