关于判断是否安装flash

//是否安装了flash

function flashChecker() {

var hasFlash = 0; //是否安装了flash

var flashVersion = 0; //flash版本

if (document.all) {

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 isSafari = /Safari/.test(navigator.userAgent)// Safari浏览器

var oScriptFirst = document.getElementsByTagName('script')[0];//页面中第一个script标签

var newScript = document.createElement('script');//创建一个script标签

if(isSafari){

newScript.src=videojsURL;//设置src

var ovideo = document.getElementById('example-video');//获取video标签

var osource =ovideo.getElementsByTagName('source')[0];

osource.setAttribute('src',om3u8);

}else{

if(!flashChecker().f){

var str = '您没有安装flash请下载安装<a target="_blank" href="https://get2.adobe.com/cn/flashplayer/" target="_blank" rel="external nofollow" style="color:#c90000">点击下载</a>';

$("#video_box").html(str).attr("style","line-height: 400px;text-align: center;font-size: 16px;");

}else{

var videoObject = {

container: '#video_box',//“#”代表容器的ID，“.”或“”代表容器的class

variable: 'player',//该属性必需设置，值等于下面的new chplayer()的对象

autoplay:true,

live:false,//直播为true;时移false

poster:my_pic,

video:om3u8//视频地址

};

var player=new ckplayer(videoObject);

}

}

oScriptFirst.parentNode.insertBefore(newScript,oScriptFirst);//videojs插入第一个script元素之前

newScript.onload = function(){//js加载完毕调用初始化

if(isSafari){

videojs('example-video',{

controls: true,//是否控制条

autoplay: true,//自动播放

preload: 'auto'//预加载

},function(){

this.on('playing', function() {

ovideo.muted = false;

});

});

}

};