function canApparentlyRunClickOnce() {
    if (navigator.userAgent.match(".NET CLR 3.5")) {
        return true;
    }
    var plugin = navigator.mimeTypes["application/x-ms-application"];
    if (plugin != null) {
        if (plugin.enabledPlugin != null) {
            return true;
        }
    }
    return false;
}