$(document).ready(function(){

    $("input[name=discount]").each(function(){

        $(this).click(function(){

            var discount = $(this).val();

            if(discount=="0"){

                $(".discount").css("display","none");

            }

            if(discount=="1"){

                $(".discount").css("display","inline");

            }

        });

    });

});

var discount=$("input[name=discount]:checked").val();