The script for this page is as follows

        <script>
            function counter() {
                if (typeof(Storage) !== "undefined") {
                    if (sessionStorage.counter) {
                        sessionStorage.counter = Number(sessionStorage.counter) + 1;
                    } else {
                        sessionStorage.counter = 1;
                    }
                    document.getElementById("number").innerHTML = sessionStorage.counter;
                    if (sessionStorage.counter > 1) {
                        document.getElementById("number").innerHTML += "<p>Refresh the Page</p>";
                    }
                } else {
                    document.getElementById("number").innerHTML = "sorry your browser does not" +
                        "support web storage";
                }
            }
    </script>    

So that is once more Another example that I currently fail to see it's relevence or how to use it in a real world Setting