<script>

var intervalId;
function check() {
    // This flag is set by cached-page-2 when it loads.
    // If the timer is fired before cached-page-2 loads, just bail and wait.
    if (!window.opener.canExit)
        return;

    clearInterval(intervalId);
    window.opener.log("Back on page-1, timer is still firing.");
    window.opener.log("PASS.");
    window.opener.finish();
}

function loadNext()
{
    // Verify that this onload handler is called only once. On navigation back
    // this page will be served from the cache, w/o firing onload.
    window.opener.reportOnload();

    intervalId = setInterval(check, 10);

    window.opener.log("page-1, about to navigate to page-2.")
    // Location changes need to happen outside the onload handler to generate history entries.
    setTimeout(function() {location.href = "cached-page-2.html";}, 0);
}
</script>
<body onload="loadNext()"></body>