怎么写禁止摇一摇函数? function shakeStop();

 
        var SHAKE_THRESHOLD = 1000;
        var last_update = 0;
        var x = y = z = last_x = last_y = last_z = 0;

        
        if (window.DeviceMotionEvent) {
            window.addEventListener('devicemotion', deviceMotionHandler, false);
        } else {
            alert('本设备不支持devicemotion事件');
        }
        
        function deviceMotionHandler(eventData) {
            var acceleration = eventData.accelerationIncludingGravity;
            var curTime = new Date().getTime();
        
            if ((curTime - last_update) > 100) {
                var diffTime = curTime - last_update;
                last_update = curTime;
                x = acceleration.x;
                y = acceleration.y;
                z = acceleration.z;
                var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
                var status = document.getElementById("status");
        
                if (speed > SHAKE_THRESHOLD) {
                    doResult();
                }
                last_x = x;
                last_y = y;
                last_z = z;
            }
        }

        function doResult() {
            //这里是弹窗  当弹窗弹出来，就禁止继续摇一摇，怎么写？
            
            congratulationTc();
            audio2.play();
            audio1.pause();
            $('.god_animation').removeClass('zindex');
     
        }