HttpGet and HttpPost through jquery In MVC3

Use something like:

$.ajax({
           type: "POST",
           url: url,
           contentType: 'application/json; charset=utf-8',
           data: postData,
           dataType: "json",
           success: function (result) {

               if (redirectOnError("json", result)) {
                   return;
               }

               SuccessFunction(result);
           },
           error: errorHandler

URL s'd be the form of "http://baseurl/controller/action". So make sure you have both defined.

For 'Get' request just change
type: "GET"
And also you have to pass parameters attached in query string.