idle-refresh.js

(function() {
    window.lastActivityTime = 0;
    window.refreshInterval = 10000;
    window.idleInterval = 60000;

    resetRefreshTimer();
    document.body.addEventListener('mousemove', resetRefreshTimer);
    document.body.addEventListener('keypress', resetRefreshTimer);
    setTimeout(refresh, window.refreshInterval);

    if (document.addEventListener) {
        if ('onwheel' in document) {
            // IE 9+, Firefox 17+, Chrome 31+
            document.addEventListener('wheel', onWheel);
        } else if ('onmousewheel' in document) {
            // old event name
            document.addEventListener('mousewheel', onWheel);
        } else {
            // Firefox 16-
            document.addEventListener('MozMousePixelScroll', onWheel);
        }
    } else {
        // IE 8-
        document.attachEvent('onmousewheel', onWheel);
    }

    function onWheel(e) {
        var delta, scrollBy;
        e = e || window.event;
        if (e.altKey) {
            // wheelDelta doesn't contain the amount of scrolled pixels
            delta = e.deltaY || e.detail || e.wheelDelta;
            scrollBy = (delta > 0) ? 100 : -100;
            window.scrollBy(scrollBy, 0);
            e.preventDefault ? e.preventDefault() : (e.returnValue = false);
        }
    }
})();

function resetRefreshTimer() {
    window.lastActivityTime = new Date().getTime();
}

function refresh() {
    if ((new Date().getTime() - window.lastActivityTime) >= window.idleInterval) {
        window.location.reload(true);
    } else {
        setTimeout(refresh, window.refreshInterval);
    }
}