jquery ajax post json对象

<p><textarea cols="50" rows="15" name="code" class="javascript"> function SaveTemplateConfigData(jsonConfigData, flagName) {
                $.ajax({
                    type: "POST",
                    dataType: "json",
                    url: "AjaxService.aspx",
                    data: { FunName: "CreateFolder", styleName: $("#TemplateConfigName_styleName").val(),
                        blocksName: $("#TemplateConfigName_blocksName").val(), jsDb: JSON.stringify(jsdata), flagName: flagName
                    },
                    success: function (data) { alert(data) },
                    eror: function (data) { alert(data) }
                });
            }</textarea></p>
<p><span><span>JSON.stringify 这个是关键否则后台接收的时候会是null<br></span>
</span>
</p>