json with jquery mvc4 mobile application?..

json with jquery mvc4 mobile application?..

$(function () {
        $('#TM1').change(function () {
           
            $.getJSON("@Url.Action("getEMI", "MISanction")", { loanamount: $("#loanamount").val(), rateofinterest: $("#rateofinterest").val(), tenureofmonths: $("#TM1").val() }, function (result)

            { $("#EMI").val(result) })

        });

 });
here json is not working.please tell how to work with json?..