這段時間做一個web端視訊實時監控功能，特此記錄一下：

h5新標籤vedio不支援rtmp流,需要flash來播放，而谷歌瀏覽器如果沒啟用flash是無法播放的，所以檢測一下在頁面給一個提示，方便使用者。為了相容不同瀏覽器，IE只支援對Object的解析；火狐，谷歌，Safari只支援對Embed的解析。我這裡只是借用了embed的樣式和提示啟用flash的功能。

<script src="http://vjs.zencdn.net/5.5.3/video.js"></script>
<link href="http://vjs.zencdn.net/5.5.3/video-js.css" rel="stylesheet">
<!-- If you'd like to support IE8 -->
<script src="http://vjs.zencdn.net/ie8/1.1.1/videojs-ie8.min.js"></script>

<div class="openFlashTips" style="width:300px;position:absolute;top:20px;left:225px;z-Index:9999;color:white">視訊無法正常播放，請點選下方啟用flash</div>
<video id="my-video" style="color:black;width:750px;height:350px" class="video-js" autoplay controls preload="auto" width="750" height="350" data-setup="{}">
    <source src="rtmp://xx.xxx.xxx.xx:xxxxx/myweb" type="rtmp/flv">//在這裡改url
</video>
<embed width="300" height="70" class="openFlash" style="position:absolute;top:130px;left:225px;z-Index:9999;" type="application/x-shockwave-flash">
<script type="text/javascript" language="JavaScript">
    function flashChecker() {
        var hasFlash = 0;         //是否安裝了flash
        var flashVersion = 0; //flash版本
        var isIE = /*@
 
[email protected]*/0;      //是否IE瀏覽器

        if (isIE) {
            var swf = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
            if (swf) {
                hasFlash = 1;
                VSwf = swf.GetVariable("$version");
                flashVersion = parseInt(VSwf.split(" ")[1].split(",")[0]);
            }
        } else {
            if (navigator.plugins && navigator.plugins.length > 0) {
                var swf = navigator.plugins["Shockwave Flash"];
                if (swf) {
                    hasFlash = 1;
                    var words = swf.description.split(" ");
                    for (var i = 0; i < words.length; ++i) {
                        if (isNaN(parseInt(words[i]))) continue;
                        flashVersion = parseInt(words[i]);
                    }
                }
            }
        }
        return {f: hasFlash, v: flashVersion};
    }

    var fls = flashChecker();
    var s = "";
    if (fls.f) {
        document.getElementsByClassName("openFlash")[0].style.display = "none";
        document.getElementsByClassName("openFlashTips")[0].style.display = "none";
//        document.write("您安裝了flash,當前flash版本為: " + fls.v + ".x");
    }
    else {
        document.getElementsByClassName("openFlash")[0].style.display = "block";
        document.getElementsByClassName("openFlashTips")[0].style.display = "block";
//        document.write("您沒有安裝flash");
    }
</script>