gistfile1.js

            window.addEventListener("blur", function () {
                if (me.sys.stopOnBlur) {
                    me.state.stop(true);
                }
                if (me.sys.pauseOnBlur) {
                        // terebentina
                    me.sys.pauseOnBlurContext = me.state.isPaused();    // save the current isPaused state so we know what to resume to
                    me.state.pause(true);
                }
            }, false);
            // set restart/resume action on gaining focus
            window.addEventListener("focus", function () {
                if (me.sys.stopOnBlur) {
                    me.state.restart(true);
                }
                // terebentina: resume the paused game only if it wasn't already paused when the window was blurred
                if (me.sys.resumeOnFocus && !me.sys.pauseOnBlurContext) {
                    me.state.resume(true);
                }
            }, false);