[Kotakota]

$.ajax({ 
  type: "GET", 
  dataType: 'jsonp', 
  data: {id:{"key1":'value1',"key2":'value2'}},
  url: 'http://localhost/jsonp/', 
  success: function (data) { 
   alert(data); 
  }, 
});

Возникла ошибка:
"NetworkError: 500 INTERNAL SERVER ERROR - http://localhost/jsonp/?callback=jsonp1313402876472&id%5Bkey1%5D=value1&i d%5Bkey2%5D=value2"