/* vim: set ts=4 tw=0 sw=4 noet: */
var timerRef=setInterval(function(){myTimer()}, 1000);
var timeStart = new Date().getTime() + timeout;
var last = -1;

function myTimer() {
    var elapsed = new Date().getTime();
    var expire = timeStart - elapsed;
    var timeLeft = Math.round(((expire % 86400000) % 3600000) / 60000);

    if (timeLeft < 0) {
        clearInterval(timerRef);
        console.log('Session expired, reload page');
        last = -1;
        location.reload();
    } else if (timeLeft == 1) {
        if (timeLeft < last || last == -1) {
            last = timeLeft;
            timeLeft = '< ' + timeLeft + ' min';
            /*console.log('Session soon to expire');*/
            document.getElementById("time").style.background = "red";
            document.getElementById("timer").innerHTML = timeLeft;
        }
    } else {
        if ((timeLeft < last && timeLeft > 0) || last == -1) {
            last = timeLeft;
            /*console.log('Session valid < ' + timeLeft);*/
            timeLeft = '< ' + timeLeft + ' min';
            document.getElementById("timer").innerHTML = timeLeft;
        }
    }
}