检测浏览器是否安装FLASH插件

    var iFlash = null;
    var version = null;
    var isIE = navigator.userAgent.toLowerCase().indexOf("msie") != -1
    if(isIE){
        //for IE

        if (window.ActiveXObject) {
            var control = null;
            try {
                control = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
            } catch (e) {
                iFlash = false;
            }
            if (control) {
                iFlash = true;
                version = control.GetVariable('$version').substring(4);
                version = version.split(',');
                version = parseFloat(version[0] + '.' + version[1]);
                alert("FLASH版本号："+version)
            }
        }
    }else{
        //for other
        if (navigator.plugins) {
          for (var i=0; i < navigator.plugins.length; i++) {
            if (navigator.plugins[i].name.toLowerCase().indexOf("shockwave flash") >= 0) {
              iFlash = true;
              version = navigator.plugins[i].description.substring(navigator.plugins[i].description.toLowerCase().lastIndexOf("Flash ") + 6, navigator.plugins[i].description.length);
            }
          }
        }
    }
    if(iFlash){
        alert(version)
    }else{
        alert("您的浏览器未安装FLASH插件");
    }