JS Universal method to detect whether the browser has installed the specified plugin (ie and non-IE general)

         /* * Detect if the specified plugin is installed     *     * pluginname plug-in name *    /function Checkplugins (pluginname) {        var np = Navigator.plugins;        if (window. ActiveXObject) {            //IE            //ActiveXObject object name            var activexobjectname = Pluginname + "." + Pluginname;            try {                var axobj = eval ("New ActiveXObject (Activexobjectname);");                Convert object to Boolean type                return axobj true:false;            } catch (e) {                return false;            }        } else if (NP && Np.length) {            //non ie for            (var i = 0; i < np.length; i++) {                if (np[i].name.tolowercase (). IndexOf (Pluginn Ame.tolowercase ())! =-1)                    return true            ;            return false;        } else {            //other returns false return False            ;        }    }