[jQuery] know if one id are hidden

HI, i work in .net and in my jquery function want know if mi object are in state hidden or not... but this 2 method not work if($("#check_id").attr("type", hidden)){//..} or if ($("#check_id").is(input[type='hidden'])){//..} what is the right metod??

[jQuery] xhr Permission Denied

HI, i have a problem whit my Jquery transaction , this is not cross domain, and i use $.ajax, in my local computer is ok, but in the web server return this error. i think the trow verified in this point // Open the socket // Passing null username, generates a login popup