ajax problem

[boyley]

HI code is as follows: $.ajax({ type:'POST', url: url, beforeSend: function (xhrObj) { xhrObj.setRequestHeader('Content-Type', 'application/json'); }, data:{}, success:function(data){}, error:function(data){}, }); I set request header Content-Type is application/json.But the actual request message header are as follows,: why is appended to the default message on the head: Content-Type:application/x-www-form-urlencoded, application/json i want remove application/x-www-form-urlencoded Media type ,leaving only application/json