I believe your URL is incorrect - you are using a relative URL and they are processed by the browser relative to the current page. It is not considered relative to the js file. For example, if you are trying to execute this request from a message page www.xyz.com/SomeFolder/page1.aspx, then your ajax request will be redirected to www.xyz.com/SomeFolder/Default.aspx/GetAge, so configure the URL accordingly.
, URL- , /services/Default.aspx/GetPage - - <your domain>/services/Default.aspx/GetPage , .