e estado probando el metodo unload de javascript pero no me funciona
<html>
<head>
<title>onunload test</title>
<script type="text/javascript">
window.onunload = unloadPage;
function unloadPage()
{
alert("unload event detected!");
}
</script>
</head>
<body>
<p>Reload a new page into the browser<br />
to fire the unload event for this page.</p>
<p>You can also use the back or forward buttons<br />
to load a new page and fire this event.</p>
</body>
</html>
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