1window.onbeforeunload = function (e) {
2  deleteAllCookies();
3}
4
5function deleteAllCookies() {
6    var cookies = document.cookie.split(";");
7
8    for (var i = 0; i < cookies.length; i++) {
9        var cookie = cookies[i];
10        var eqPos = cookie.indexOf("=");
11        var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
12        document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
13    }
14}
15

1function deleteAllCookies() {
2    var cookies = document.cookie.split(";");
3
4    for (var i = 0; i < cookies.length; i++) {
5        var cookie = cookies[i];
6        var eqPos = cookie.indexOf("=");
7        var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
8        document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
9    }
10}
11