var myVid = $('#' + showImgId)[0];                                if (myVid != null) {                                    var duration;                                    myVid.load();                                    myVid.oncanplay = function () {                                        console.log("myVid.duration", myVid.duration);                                    }                                }

　　

var time = _audio.duration;        //分钟    var minute = time / 60;    var minutes = parseInt(minute);    if (minutes < 10) {        minutes = "0" + minutes;    }    //秒    var second = time % 60;    var seconds = Math.round(second);    if (seconds < 10) {        seconds = "0" + seconds;    }