jquery to bind states in dropdown when country is selected in MVC

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MVC4

jquery to bind states in dropdown when country is selected from another dropdown in MVC 4 while registering user..

I have got the states name in one list "stateList" while selecting country name from dropdown through the function "GetStatesList"

[HttpPost]
[AllowAnonymous]
public ActionResult GetStatesList(int countryid)
{
TracFindDALContainer tracFindStates = null;
List<registermodel> stateList = null;
try
{
using (tracFindStates = new TracFindDALContainer())
{
var statebind = (from s in tracFindStates.States
join c in tracFindStates.Countries on s.Id equals c.Id
where s.CountryID == countryid
select new RegisterModel
{
Stateid =s.Id,
StateName =s.StateName });

if (statebind == null)
return Json(null);
stateList = (List<registermodel>)statebind.ToList();
return Json(stateList);

}
}
catch (Exception ex)
{
LogManager.WriteErrorLog(ex);
objStringBuilder.Clear();
objStringBuilder.AppendLine("Start: StateList, StateList Method");
objStringBuilder.Append(ex.Message);
LogManager.WriteTraceLog(objStringBuilder);
return null;
}

}

but thruogh jquery I am not getting states in doropdown..

Plz help...