function getIsEnabled() {
    if(typeof(Sys)!=='undefined') {
        var r =  new Sys.Net.WebRequest();
        r.set_url('/js/IsEnabled.ashx');
        r.set_httpVerb("GET");
        r.add_completed(onWebRequestCompleted);
        r.invoke();
    }   
}
function onWebRequestCompleted(executor, eventArgs) {
    if (executor.get_aborted() || executor.get_timedOut()) {
        Sys.Debug.trace('jsEnabled=not');
    }
    else {
        Sys.Debug.trace('jsEnabled=' + executor.get_statusCode());
    }
}