JavaScript runtime error: 'YearChange' is undefined

Question

Hi,

I am working with MVC4

In this my controller code is like this

public JsonResult GetMonthByYear(int Year)

{

var lst = PODb.orders.Where(x => x.Year == Year).Distinct().ToList().FirstOrDefault();

long lnSupName = Convert.ToInt64(Year);

po po = PODb.poes.Where(x => x.ID == lnSupName).FirstOrDefault();

string strSupplierPhno = PODb.poes.Where(x => x.ID == po.ID).Select(c => c.OfficePhoneNo).FirstOrDefault();

string strContactPerson = PODb.poes.Where(x => x.ID == po.ID).Select(c => c.Contacts).FirstOrDefault();

return Json(new { suplierPhnNo = strSupplierPhno, contactName = strContactPerson });

}

 I have written the below code in my view

function YearChange() {

alert("strsupName");

var strsupName = $('#Year_ID').val();

if ((strsupName) != "")

{

alert(strsupName);

var options = {};

options.url = "/PO/GetMonthByYear";

options.type = "POST";

options.dataType = "json";

options.data = { Year: $("#Year_ID").val() };

options.success = function (result) {

var Text_PhnNumber = result.;

document.getElementById("txtSupplierPhnId").value = Text_PhnNumber;

var Text_ContactPerson = result.contactName;

document.getElementById("txtcontactId").value = Text_ContactPerson;

}

$.ajax(options);

}

}

 

@Html.DropDownListFor(x => x.Year,(IEnumerable<SelectListItem>)ViewData["Year"], "Year", new {Id = "Year_ID", @onchange = "return YearChange();" }) 

 with the above code I want to populate another Months dropdown when particular year is changed.

I am getting the below exception

 JavaScript runtime error: 'YearChange' is undefined

 Also i added the below references

<script src='http://code.jquery.com/jquery-latest.min.js' type='text/javascript'></script>

<script src="~/js/jquery.js"></script> 

<link href="//code.jquery.com/ui/1.11.2/themes/smoothness/jquery-ui.min.css" rel="stylesheet" type="text/css" />

<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>

<script src="//code.jquery.com/ui/1.11.2/jquery-ui.min.js">

</script>

 

Please help on this