ASP.NET

public ActionResult Index(){
  ViewBag.Clubs = db.Clubs.OrderByDescending(c => c.Name).ToList();
  ViewBag.Comps = db.Competitions.OrderByDescending(c => c.StartDate).ToList();
  ViewBag.Teams = db.Teams.OrderBy(t => t.Name).ToList();
  return View();
}

public IList<Competition> GetCompetitionList(int clubid)
{...}

public IList<Team> GetTeamList(int compid)
{...}

[AcceptVerbs(HttpVerbs.Get)]
public JsonResult LoadCompsByClubId(string clubid)
{
  var compsList = this.GetCompetitionList(Convert.ToInt32(clubid));
  var compsData = compsList.Select(m => new SelectListItem(){
			Text = m.Name,
			Value = m.Id.ToString()
			});
  return Json(compsData, JsonRequestBehavior.AllowGet);
}

[AcceptVerbs(HttpVerbs.Get)]
public JsonResult LoadTeamsByCompId(string compid)
{
  var teamsList = this.GetTeamList(Convert.ToInt32(compid));
  var teamsData = teamsList.Select(c => new SelectListItem(){
			Text = c.Division.Name,
			Value = c.Id.ToString()
			});
return Json(teamsData, JsonRequestBehavior.AllowGet);
}

public ActionResult PlayerList(Team team)
{
if (team == null)
{
return HttpNotFound();
}
  var players = from p in db.Sharks_Player
		join t in db.Sharks_Player_CompTeam
		on p.Id equals t.PlayerId
		orderby p.FirstName
		where t.CompTeam_Id == team.Id
		select p;
  return View(players);
}

<script type="text/javascript">
	$(document).ready(function () {
		$("#ddlClubs").change(function () {
			var clubid = $(this).val();
			$.getJSON("../Players/LoadCompsByClubId", { clubid: clubid },
                    function (compsData) {
                    	var select = $("#ddlComps");
                    	select.empty();
                    	select.append($('<option/>', {
                    		value: 0,
                    		text: "Select a Competition"
                    	}));
                    	$.each(compsData, function (index, itemData) {
                    		
                    		select.append($('<option/>', {
                    			value: itemData.Value,
                    			text: itemData.Text
                    		}));
                    	});

                    });
		});
		$("#ddlComps").change(function () {
			var compid = $(this).val();
			$.getJSON("../Players/LoadTeamsByCompId", { compid: compid },
				function (teamsData) {
					var select = $("#ddlTeams");
					select.empty();
					select.append($('<option/>', {
						value: 0,
						text: "Select a Team"
				}));
				$.each(teamsData, function (index, itemData) {
					select.append($('<option/>', {
					value: itemData.Value,
					text: itemData.Text
				}));
			});
		});
	});
});
</script>

 <p>
     @Html.DropDownListFor(Model => Model.Clubs, new SelectList(ViewBag.Clubs as System.Collections.IEnumerable, "Id", "Name"),
         "Select a Club", new { id = "ddlClubs" })

 </p>

 <p>

    @Html.DropDownListFor(Model => Model.Competitions, new SelectList(Enumerable.Empty<SelectListItem>(), "Id", "Name"),
        "Select a Competition", new { id = "ddlComps" })

 </p>

 <p>
    @using(Html.BeginForm("PlayerList", "Players", FormMethod.Get)){
	@Html.DropDownListFor(Model => Model.Teams, new SelectList(Enumerable.Empty<SelectListItem>(), "Id", "Name"),
          "Select a Team", new { id = "ddlTeams" })<input type="submit" value="Get Player List" />
    }
 </p>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
     <AjaxSettings>
           
                <telerik:AjaxSetting AjaxControlID="paymentTypeList">
             <UpdatedControls>
                                  <telerik:AjaxUpdatedControl ControlID="paymentTypeList"  ></telerik:AjaxUpdatedControl>
                      <telerik:AjaxUpdatedControl ControlID="tbxChargeAmount"  ></telerik:AjaxUpdatedControl>
 
             </UpdatedControls>
         </telerik:AjaxSetting>

SEC7115: :visited and :link styles can only differ by color. Some styles were not applied to :visited.
Accounts.aspx
SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format.
Telerik.Web.UI.WebResource.axd, line 9 character 15475
SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format.
Telerik.Web.UI.WebResource.axd, line 9 character 15475
SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in a correct format.
Telerik.Web.UI.WebResource.axd, line 9 character 15475

Unhandled exception at line 2610, column 1 in http://localhost:58443/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=;;AjaxControlToolkit,+Version=4.1.50927.0,+Culture=neutral,+PublicKeyToken=28f01b0e84b6d53e:en-US:c95f669f-226b-4768-8ab5-43ac217de4dd:ea597d4b:b25378d2;Telerik.Web.UI,+Version=2012.2.607.40,+Culture=neutral,+PublicKeyToken=121fae78165ba3d4:en-US:08ccafd1-fc13-48c0-b85b-a439ce2f6884:16e4e7cd:86526ba7:874f8ea2:ed16cbdc:f7645509:24ee1bba:7165f74:58366029:1e771326:f9b9258;AjaxControlToolkit,+Version=4.1.50927.0,+Culture=neutral,+PublicKeyToken=28f01b0e84b6d53e:en-US:c95f669f-226b-4768-8ab5-43ac217de4dd:923aa3cc:853c2e0b:f9ae838a:782b16ab:d754780e:1e088fb:52c703eb:46f97eb1:50114f04:f48dface:28a7831e
 
0x800a138f - JavaScript runtime error: Unable to get property 'id' of undefined or null reference