I want to make a confirmation before user leaving the page. If he says ok then it would redirect to new page or cancel to leave. I tried to make it with onunload
<script type="text/javascript">
function con() {
var answer = confirm("do you want to check our other products")
if (answer){
alert("bye");
}
else{
window.location = "http://www.example.com";
}
}
</script>
</head>
<body onunload="con();">
<h1 style="text-align:center">main page</h1>
</body>
</html>
But it confirm after page already closed? How to do it properly?
It would be even better if someone shows how to do it with jQuery?