json - MVC 2 上的 Json 问题

Question

$(document).ready(function () {
        $("#deceasedmonths").change(function () {
            $.ajax({
                type: "POST",
                url: '<%=Url.Action("ArchiveList", "Deceased","POST")%>',
                dataType: 'json',
                data: { month: $("#deceasedmonths :selected").val() },
                success: function (response) {
                var markup = "<div><tr><th>First Name</th><th>Last Name</th><th>Gender</th><th>Date     of Death</th></tr></div>";
                    for (var x = 0; x < response.length; x++) {
                        var val = response[x].split(",");
                        markup += "<tr><td>" + val[0] + "</td><td>" + val[1] + "</td><td>" + val[2]                     + "</td><td>" + val[3] + "</td></tr>";
                    };
                    $("#archivelistdeceasedgridview").html(markup).show();
                }
            })
        });
    });

我有上面的代码从 MVC 2 控制器返回一个 Json。该代码在 Firefox 中有效，但在 Internet Explorer 中无效。有人可以帮忙...
谢谢