javascript - Why do I keep getting an "undefined" error with this JSONP feed? -

i using following code retrieve data in jsonp format. need use if no data returned, can flag error. using jquery's ajax(), returns 404 pages being successful, need use jquery-jsonp jquery plug-in on google code error handling.

i borrowed code example on jquery ajax (jsonp) ignores timeout , doesn't fire error event, cannot seem work json, being sent mime type "application/json" other server.

$(function(){     var jsonfeed = "http://othersite.com/feed.json";      $.jsonp({         url: jsonfeed,         datatype: "jsonp",         timeout: 5000,         success: function(data, status){             $.each(data.items, function(i,item){                 console.log("title: " + item.title);                  if (i == 9) return false;             });         },         error: function(xhr, textstatus, errorthrown){             console.log("error status: " + textstatus);             console.log("error thrown: " + errorthrown);         }     }); }); 

here example of json:

[ { "title" : "my title" } ]

can spot problem?

are sure "othersite.com" supports jsonp. json cannot converted jsonp client. server needs support wrapping content callback function.