<script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
//一般情况下，这样就可以自动播放了，但是一些奇葩iPhone机不可以
document.getElementById('car_audio').play();
//必须在微信Weixin JSAPI的WeixinJSBridgeReady才能生效
document.addEventListener("WeixinJSBridgeReady", function () {
document.getElementById('car_audio').play();
document.getElementById('video').play();
}, false);
</script>