masterdetails.cshtml

@model IEnumerable<PartialView_Ajax.Models.VentasMes>

@{
    ViewBag.Title = "Resumen";
}

<h2>Resumen Ventas</h2>
<table>
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Mes)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Valor)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Mes)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Valor)
        </td>
        <td>
            @Ajax.ActionLink("Detalles", "ViewDetails", new { id = item.Id}, new AjaxOptions { UpdateTargetId="divDetails" }, new  {@class = "linkDetail" })
        </td>
    </tr>
}

</table>
<div id="divDetails"></div>
<button id="btnOcultar">Ocultar</button>

@section scripts
{
    <script>
    $(document).ready(function () {
        $('#btnOcultar').click(function () {
            $('#divDetails').hide();
        });

        $('.linkDetail').click(function () {
            $('#divDetails').show();
        });
    });
    </script>
}