Regarding jquery for chosen plugin

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C#

Javascript

C#4.0

Hi,
I had my view like,
Controller

@Html.DropDownList("CompanyID", null, "Select Company", new { onchange = "GetDiv()" })
 @Html.DropDownList("WarehouseID",null, new { @class = "warehouse-select" })

on my CompanyID dropdown select I need my WarehouseID so,
I wrote the javascript code like,

function GetDiv() {
        debugger;
        var warehouseno = $("#CompanyID").val();
        $.ajax(
        {
            type: "POST",
            url: "@Url.Action("GetWarehouseDropdown", "SearchJDE")",
            dataType: 'json',
            data: { id: warehouseno },
            success: function (result) {
                $("#WarehouseID").html("");
                for (var i = 0; i < result.length; i++)
                {
                 var item = result[i];$("#WarehouseID").append($("<option></option>").val(item.Value).html(item.Text)); //$("#WarehouseID").trigger("liszt:updated");
                }
            },
            error: function (req, status, error) {
            }
        });
    }

my controller:

[HttpPost]
       public JsonResult GetWarehouseDropdown(string id)
       {
           ViewBag.ModuleName = "OperManag";
           if (Session["userName"] != null)
           {
               strUserName = Session["userName"].ToString();
           }

           IList<SelectListItem> objWarehouseMaster = (from s in db.WarehouseMasters
                                                       join u in db.UserPermissionMappings on new { s.CompanyID, s.IsDeleted } equals new { u.CompanyID, u.IsDeleted }
                                                       where u.UserID == strUserName && s.CompanyID == id && s.IsDeleted == false
                                                       select new SelectListItem() { Text = s.WarehouseID + "-" + s.WarehouseName, Value = s.WarehouseID }).ToList<SelectListItem>();

           return Json(objWarehouseMaster, JsonRequestBehavior.DenyGet);
       }

Here my controller can fetch the data but javascript function success is not working

Please help me