<html>
<head>
<script>

function pageShown(evt)
{
    if (evt.persisted)
        alert("pageshow event handler called.  The page was just restored from the Page Cache.");
    else
        alert("pageshow event handler called for the initial load.  This is the same as the load event.");
}

function pageHidden(evt)
{
    if (evt.persisted)
        alert("pagehide event handler called.  The page was suspended and placed into the Page Cache.");
    else
        alert("pagehide event handler called for page destruction.  This is the same as the unload event.");
}

window.addEventListener("pageshow", pageShown, false);
window.addEventListener("pagehide", pageHidden, false);

</script>
<body>
<a href="http://www.webkit.org/">Click for WebKit</a>
</body>
</html>