var globalTimeFlag = true;


var globalTime = {
    absolute: 0,
    relative: 0,
    scale: 1.,
    getAbsolute: function () { return this.absolute; },
    getRelative: function () { return this.relative; }
};

window.setInterval(function () {
    if (globalTimeFlag) {
        globalTime.relative += 0.001 * globalTime.scale;
        globalTime.absolute += 0.001;
    }
}, 10);