jquery,音乐播放，jquery对象转换成js对象

<audio id="audio" src="./img/scanSuccess.mp3"></audio>
function playMusic() {
  var player = $("#audio")[0]; /*jquery对象转换成js对象*/
  if (player.paused){ /*如果已经暂停*/
      player.play(); /*播放*/
  }else {
      player.pause();/*暂停*/
  }
}