在线演示：http: //jsfiddle.net/thefourtheye/GP5HE/

代替 SPAN 标签，您可以使用它

<select onChange="playVideo(this)">
    <option value="Trailer5">Terms and Conditions may Apply</option>
    <option value="Trailer10">How to Train your Dragon 2</option>
</select>

并且必须像这样修改脚本

<script type='text/javascript'>
    function playVideo(a)
    {
        a = document.getElementById(a.value);
        b = document.getElementById("videoPlayback");
        b.innerHTML = a.innerHTML;
    }
</script>