HTML5背景音乐的暂停与播放

HTML代码：

    <audio id="myaudio" loop="loop" preload="auto" autoplay="autoplay">

                    <source src="music/纯音乐%20-%20在那遥远的地方%20-%20纯音乐版.mp3" type="audio/ogg" />

                    <source src="music/纯音乐%20-%20在那遥远的地方%20-%20纯音乐版.mp3" type="audio/mp3" />

                </audio>

       <img onclick="swap_music()" src="/images/icon_music.png" style="height:30px; vertical-align:middle;" />

JS代码：

 //背景音乐停止与播放

        function swap_music() {

            var oAudio = document.getElementById('myaudio');

            if (oAudio.paused) {

                oAudio.play();

            }

            else {

                oAudio.pause();

            }

        }