var t, s, timer = 16;

$(document).ready(function() {
    window.onload = resetTimer;
    s = setInterval(function() {
        --timer;
    }, 60000);
    // DOM Events
    document.onmousemove = resetTimer;
    document.onkeypress = resetTimer;
    document.onclick = resetTimer;
    });

    function logout() {
    timed_out = true;
    $('main').fadeOut();
    $('footer').fadeOut();
    $('#screensaver').fadeIn();
    }

    function resetTimer() {
    clearTimeout(t);
    timer = 16;
    $('main').fadeIn();
    $('footer').fadeIn();
    $('#screensaver').fadeOut();
    timed_out = false;
    t = setTimeout(logout, 60000);
    }