@model Cars.Web_New.Models.DropDownViewModel

@using (Ajax.BeginForm("SelectModel", "Home", new AjaxOptions()
{
    HttpMethod = "POST",
    InsertionMode = InsertionMode.Replace,
    UpdateTargetId = "years",
    OnSuccess = "UpdateModelsHiddenForms('SelectedModelId', 'model-input')"

}, new { id = "model-dropdown" }))
{
    @Html.DropDownListFor(
            m => m.SelectedModelId,
            new SelectList(Model.Models, "Id", "Name"),
                new { id = "model-input" }
        )
}


<script>

    $("#model-input").change(function () {
        $("#model-dropdown").submit();
    });

</script>