JavaScript检测flash player的版本号

function getFlashVersion() {
    var flashVer = NaN;
    var ua = navigator.userAgent;

    if (window.ActiveXObject) {
        var swf = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');

        if (swf) {
            flashVer = Number(swf.GetVariable('$version').split(' ')[1].replace(/\,/g, '.').replace(/^(\d+\.\d+).*$/, "$1"));
        }
    } else {
        if (navigator.plugins && navigator.plugins.length > 0) {
            var swf = navigator.plugins['Shockwave Flash'];

            if (swf) {
                var arr = swf.description.split(' ');
                for (var i = 0, len = arr.length; i < len; i++) {
                    var ver = Number(arr[i]);

                    if (!isNaN(ver)) {
                        flashVer = ver;
                        break;
                    }
                }
            }
        }
    }

    return flashVer;
}


var flashVer = getFlashVersion();

if (!isNaN(flashVer)) {

    document.write('当前flash player 的版本：' + flashVer);

} else {
    document.write('您尚未安装flash播放器');
}