//要自动播放的video
var video = $('.e_bannerD-2').find('video')
//判断video存在且在微信中
if(video.length>0 && isWeixin()){
        var u = navigator.userAgent;
        //判断android
        if(u.indexOf('Android') > -1 || u.indexOf('Linux') > -1){
                document.addEventListener('touchstart', function(){
                        video[0].play()
                })
        //判断iphone
        }else if(u.indexOf('iPhone') > -1){
                document.addEventListener('WeixinJSBridgeReady', function(){
                        video[0].play()
                })
        }
}