javascript - Having Trouble with a cross Domain jquery/Ajax service call -

i've read through thread after thread on here , elsewhere trying cross domain ajax call work. have restful wcf service returns simple bool. have setup proper response format (json) , expected url callback parameter:

[webget(requestformat = webmessageformat.json,  responseformat = webmessageformat.json,  uritemplate = "showcreditcardtextjquery?membernumber={membernumber}&callback={callback}",  bodystyle = webmessagebodystyle.wrappedrequest)] 

my ajax looks this:

$.ajax({     url: "http://example.com/service/service.svc/showtextjquery",     type: "get",     contenttype: "application/json; charset=utf-8",     datatype: "jsonp",                    crossdomain:true,     data: "{'membernumber':'" + membernumber + "'}",     cache: false,                    //success: alert(membernumber),     success: function (data) {         var output = data;          if (!data) {             $("#dialog").dialog(            {                modal: true,                width: 735,                height: 550            });         }     },     error: function (xhr, ajaxoptions, thrownerror) {         alert(xhr.status);     } }); 

i receive 200 response coming in error block. @ loss (and still pretty new jquery/ajax). appreciated.

may these lines of code solve problem, regular web service call

          var jsondata = [your json parameter];              $.ajax({                 async: false,                 type: "post",                 url: [your web service url],                 contenttype: "application/json; charset=utf-8",                                   data: json.stringify({ json: jsondata }),                 datatype: "json",                                 success: onsuccess,                 failure: function(err) {                     alert("error : " + err.d);                 }               });               function onsuccess(data) {                 alert("success:" + data.d);                                    } 

you can 1 thing need set access-control-allow-origin & access-control-allow-headers in customeheaders web service web.config file.

 <add name="access-control-allow-origin" value="*" />  <add name="access-control-allow-headers" value="content-type" /> 

if want allow specific domain , can specific value of domain instead of * value