Question

如果主视频存储库（smugmug.com）无法访问（公司防火墙），这是我一直在努力更改视频源URL的代码。问题是我必须运行一个循环来等待SMimage.src = "http://smugmug.com/favicon.ico";加载，并且此代码在smugMugChecked = true时不会退出循环。 clearInterval()似乎没有用，即使我将checkInterval声明为全局变量。

<head>
<script>
    var checkInterval = null;
    // check if SmugMug is reachable (run once only)
    var isSmugMug = "1";
    var smugMugChecked = false;

    var SMimage = new Image();
    SMimage.onload = function () {
        window.isSmugMug = "1";
        smugMugChecked = true;
        // The user can access SmugMug
    };
    SMimage.onerror = function () {
        // The user can't access SmugMug
        window.isSmugMug = "0";
        smugMugChecked = true;
    };
    SMimage.src = "http://smugmug.com/favicon.ico";

    function changeImage(p1, p2, p3) {

        checkInterval = setInterval(function () {
            if (smugMugChecked == true) {
                clearInterval(checkInterval);
                if (window.isSmugMug == 0) {
                    //Hello();
                    var player = document.getElementById(p1);
                    var mp4Vid = document.getElementById(p2);

                    player.pause();

                    // Now simply set the 'src' attribute of the mp4Vid variable!!!!
                    // (...using the jQuery library in this case)

                    //$(mp4Vid).attr('src', p3);
                    document.getElementById(p2).src = p3;

                    player.load();
                    //player.play();
                }
            }
        }, 500);

    }

</script>



</head>

<body>

<video id='video9.1' onloadstart="changeImage('video9.1','source9.1', 'http://videos.ultrasoundoftheweek.com/photos/i-fDJHzts/0/960D/i-fDJHztsD.mp4')" width="792" height="470" controls> <source id='source9.1' src="http://www.ultrasoundoftheweek.com/wp-content/uploads/2014/07/heterotopic.mp4"/>
<source id='else2' src="http://www.ultrasoundoftheweek.com/wp-content/uploads/2014/07/heterotopic.webm"/>
</video>

</body>

即使使用全局var声明，clearInterval也不起作用

0 个答案: