I have a web page that handles remote control of a machine through Ajax. When user navigate away from the page, I'd like to automatically disconnect from the machine. So here is the code:

window.onbeforeunload = function () {

  bas_disconnect_only();

}

The disconnection function simply send a HTTP GET request to a PHP server side script, which does the actual work of disconnecting:

function bas_disconnect_only () {

   var xhr = bas_send_request(req=10, function () {

   });

}

This works fine in FireFox. But with Chrome, the ajax request is not sent at all. There is a unacceptable workaround: adding alert to the callback function:

function bas_disconnect_only () {

   var xhr = bas_send_request(req=10, function () {

     alert(You're been automatically disconnected.);

   });

}

After adding the alert call, the request would be sent successfully. But as you can see, it's not really a work around at all.

Could somebody tell me if this is achievable with Chrome? What I'm doing looks completely legit to me.

Thanks,