From a client side use $.ajax:

$.ajax({

   type: POST,

   url: users/save,

   data: name=John&location=Boston,

   success: function(msg){

     alert( Data Saved:  + msg );

   }

From a server side handle ajax requests:

public ActionResult Save(string name, string location)

{

  //Save data



  return new JsonResult(){Data = User was saved!};

}

Use JsonResult to return json string to the client and JSON.parse to parse json string at the client side.

To simplify ajax calls you can also create wrappers around $.ajax and JsonResult, define your ajax requests structure like {data:jsonString, messagess: [], redirect_url } etc.

That's all tutorial.