jQuery(e).getJSON(url,callback),should always load callback after submit.

[Constantinee]

when the server does not write any thing to the response object, the callback will not be called. I am writing a function to infinite check server(jee) whether there is a info.

[dmethvin]

I am not sure of the bug being reported here. If jQuery(e) returns an empty set, the request won't happen and callback will not be called because there is no this element to report to the callback function. If that is not what you are reporting, reopen this ticket with a test case.