添加json直接输出头信息

@@ -140,11 +140,7 @@ class Controller_Abstract extends Framework_YController
 	 */
 	protected function returnJson($status = true, $code = 0, $data = '', $message = '')
 	{
-		if ($this->_request->isAjax())
-		{
-			header('Content-Type: application/json; charset=utf-8;');
-		}
-		
+		header('Content-Type: application/json; charset=utf-8;');
 		return Util_Json::encode(array(
 			'status' => $status, 
 			'code' => $code,