Detect close tab/browser without message etc?
<p>I would like doing in javascript (jQuery):</p>

<pre><code>if (close tab || close window) {
   $.ajax({
        type: "POST",
        url: "process_form.php",
        data: dataString

        });
}
</code></pre>

<p>Is this possible without message if you want leave page etc?</p>
