@{ var guid = Guid.NewGuid(); }
<script language="javascript" type="text/javascript">
    $(function(){
        var form = $('#form-@guid').ajaxForm({
            dataType: 'json',
            type:'post',
            beforeSerialize: function ($form, options) {

                //inform the server you need JsonResult return
                var jsonResultHidden = form.find('input:hidden[name=JsonResult]').val(true);
                if (!jsonResultHidden.length) {
                    jsonResultHidden = $('<input type="hidden" name="JsonResult" value="true"/>').appendTo(form);
                }
            },
            success: function (response, textStatus) {
                if (response.Success) {
                    if (response.RedirectUrl) {
                        window.location.href = response.RedirectUrl;
                    } else {
                        window.location.reload(true);
                    }
                } else {
                    var msgStr = '';
                    for (var i = 0; i < response.Messages.length; i++) {
                        msgStr += response.Messages[i] + '\r\n';
                    }

                    var validator = form.validate();
                    //var errors = [];
                    for (var i = 0; i < responseData.FieldErrors.length; i++) {
                        var obj = {};
                        obj[responseData.FieldErrors[i].FieldName] = responseData.FieldErrors[i].ErrorMessage;
                        validator.showErrors(obj);
                    }

                    alert(msgStr);
                }
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) { }
        });
    });
</script>

<div class="common-form">
    <h5 class="title">Update content</h5>
    <form id="form-@guid" method="post"  action="@Url.FrontUrl().SubmissionUrl("UpdateComment")">
        @Html.AntiForgeryToken()
        <input type="hidden" name="JsonResult" value="true" />
        <input type="hidden" name="uuid" value="@ViewBag.Article.UUID" />
        @*<input type="hidden" name="RedirectUrl" value='@Url.FrontUrl().PageUrl("Thankyou")'/>*@
        @*<input type="hidden" name="JsonResult" value='true'/>*@
        @*<input type="hidden" name="Categories[0].FolderName" value="@ViewBag.category.FolderName" />*@
        @*<input type="hidden" name="Categories[0].UUID" value="@ViewBag.category.UUID" />*@	
		@*<input type="hidden" name="ParentUUID" value="@ViewBag.Article.UUID" />*@
        <table>
            <tbody>
                <tr>
                    <th><label for="title">title:</label></th>
                    <td>
                        <input type="text" id="title" name="title" data-val-required="title is required" data-val="true" value="@ViewBag.Article.Title"/>
                        @Html.ValidationMessageForInput("title")
                    </td>
                </tr>
                <tr>
                    <th><label for="Summary">Summary:</label></th>
                    <td>
                        <textarea id="Summary" name="Summary" cols="20" rows="10">@ViewBag.Article.Summary</textarea>
                    </td>
                </tr>
                <tr>
                    <th></th>
                    <td><input type="submit" name="submit" value="submit" /></td>
                </tr>
            </tbody>
        </table>
    </form>
</div>