Video.js vidSwap Flash后备

Question

我最初在视频标签中加载了一个介绍视频，然后使用vidSwap功能将其替换为其他视频。出于某种原因，下面的代码只是重新加载介绍视频。谁能看到我在这里做错了什么？

<div style="width:944px; height:402px; margin-left:8px; margin-top:8px">
    <div style="width:223px; height:402px; float:left;">

        <div id="menu" style="height:400px;">
            <a href="#" onClick="javascript:vidSwap('video/video-1.mp4'); return false;">
                <div class="button">Button 1</div>
            </a>
            <a href="#" onClick="javascript:vidSwap('video/video-2.mp4'); return false;">
                <div class="button">Button 2</div>
            </a>
            <a href="#" onClick="javascript:vidSwap('video/video-3.mp4'); return false;">
                <div class="button">Button 3</div>
            </a>
        </div>

    </div>

    <div id="video-panel" style="width:711px; height:400px; float:left; margin-left:10px; position:relative; background-color:#000">

        <section>
            <video id="video" class="video-js vjs-default-skin" controls autoplay preload="auto" width="711" height="400">
                <source src="video/intro.mp4" type='video/mp4'>
            </video>

            <script>
                var myPlayer = _V_("video");

                function vidSwap(vidURL) {
                    myPlayer.src = vidURL;
                    myPlayer.load();
                    myPlayer.play();
                }
            </script>

        </section>
    </div>
</div>