当浏览器由于某种原因无法以HTML格式获取媒体数据时执行脚本？
当浏览器无法获取媒体日期时，请使用HTML中的onstalled 属性执行脚本。
onstalled 属性可用于下列元素-
<video> <audio>
以下是<video>的语法-
<video onstalled ="script">
以下是<video>的语法-
<audio onstalled = "script">
示例
您可以尝试运行以下代码以实现onstalled 属性-
<!DOCTYPE HTML>
<html>
<body>
<video width = "300" height = "200" controls onstalled ="display()">
<source src = "/html5/foo.ogg" type = "video/ogg" />
<source src = "/html5/foo.mp4" type = "video/mp4" />
Your browser does not support the video element.
</video>
<script>
function display() {
alert ("Sorry! Video isn't available right now!");
}
</script>
</body>
</html>