Passing SelectedValue from HTML.DropDownList to View

Hi all,

how to pass value from HTML.DropDownList to AJAX Action Link Helpers???
i have this code, if i explicitly insert value to territryID..the View is populate correctly

Code:

---

@using (Html.BeginForm())
{
        @: Location @Html.DropDownList("territryID", (SelectList)ViewBag.Territory, "choose one")
        @Ajax.ActionLink(
                "ok",
                "Info", new { territryID =  ????},
                new AjaxOptions
                {
                        InsertionMode = InsertionMode.Replace,
                        HttpMethod = "POST",
                        UpdateTargetId = "post1"
                })

        <div id="post1">
        </div>
}

---

thx,
erick