check plugin in browser

//invalid in IE
    function hasPlugin(name) {
        name = name.toLowerCase();
        for (var i = 0; i < navigator.plugins.length; i++) {
            if (navigator.plugins[i].name.toLowerCase().indexOf(name) > -1) {
                return true;
            }
        }

        return false;
    }

    //only for IE
    function hasIEPlugin(name) {
        try {
            new ActiveXObject(name);
            return true;
        } catch (ex) {
        return false;
        }
}

//check Flash in all browser
function hasFlash() {
    var result = hasPlugin("Flash");
    if (!result) {
        result = hasIEPlugin("ShockwaveFlash.ShockwaveFlash");
    }
    return result;
}

//check QuickTime in all browser
function hasFlash() {
    var result = hasPlugin("QuickTime");
    if (!result) {
        result = hasIEPlugin("QuickTime.QuickTime");
    }
    return result;
}