Question

How can I change the alert into a Label?

                $.ajax({
                type: "POST",
                url: pageUrl + '/ProcessADRequest',
                data: '{SSNID: "' + $("[id$='_empLast4Txt']").val() + '", DOB: "' +    $("[id$='_empDobTxt']").val() + '"}',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (response) { alert(response.d); },
                failure: function (response) { alert(response.d); }

            });

Answer 1

So if you just want to render it in a label and assuming you want it appended to the body of the document, then here you go

$.ajax({
        type: "POST",
        url: pageUrl + '/ProcessADRequest',
        data: '{SSNID: "' + $("[id$='_empLast4Txt']").val() + '", DOB: "' +    $("[id$='_empDobTxt']").val() + '"}',
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (response) { $('body').append("<label>" +response.d + "</label>"); },
        failure: function (response) { alert(response.d); }

      });