How to pass value on dropdown change event to controler

@model WCFWithMVC.Models.EmployeeModel

@{
    ViewBag.Title = "EmpDetail";

}

<script type="text/javascript">

//    $(document).ready(function () {
//        $('#BtnSubmit').click(function () {

//            var text = $('#RoleCode :selected').text();
//            alert(text);

//            var k = $('#Address').val();
//            alert(k);

//            var Seleted = $('#RoleCode').val();
//            alert(Seleted);

//
//        });

////        $("#RoleCode").change(function () {
////        $.ajax({
////           url: "Employee/ActionName",
////           type: 'POST',
////           cache: false,
////           data: { Selected: $("# Selected").val() },
////           success: function (data) {
////             //
////           }
////         });

//    });


    $(document).ready(function () {
        $("#RoleCode").change(function () {
            $.get("/Employee/ActionName", "Himan", function (data) {
                alert(data);
            });
        });
    });


    function somefunction() {
        $.ajax({
            url: 'Employee/ActionName'+"Himan", // SomeController, ActionName
            type: 'POST',
            data: "Himan",
            datatype:"json",
            success: function (data) {
                // Success Callback
                alert(data)
            }
        });
    }
</script>
<h2>EmpDetail</h2>

This is Employee Page

<table style="width:100%">
<tr>
<td style="width:20%;text-align:right">Employee:</td>
<td style="width:80%;text-align:left"> @Html.EditorFor(k => k.Address)</td>
</tr>
<tr>
<td style="width:20%;text-align:right">Salary:</td>
<td style="width:80%;text-align:left">@Html.EditorFor(k=>k.Salary)</td>
</tr>
<tr>
<td style="width:20%;text-align:right">Sex:</td>
@*<td style="width:80%;text-align:left"> @Html.DropDownListFor(k => k.RoleCode, ViewData["Rolenames"] as SelectListItem[], new { onchange = "somefunction();" })</td>*@
<td style="width:80%;text-align:left"> @Html.DropDownListFor(k => k.RoleCode, ViewData["Rolenames"] as SelectListItem[])</td>
</tr>
<tr>
<td style="width:20%;text-align:right">Add:</td>
<td style="width:80%;text-align:left">@Html.TextBox("Add")</td>
</tr>
<tr>
<td style="width:20%;text-align:right">Martial Status:</td>
<td style="width:80%;text-align:left">@Html.Label("Single")&nbsp;&nbsp; @Html.RadioButtonFor(k=>k.MartialStatus,"0")&nbsp;&nbsp @Html.Label("Married") &nbsp;&nbsp;@Html.RadioButtonFor(k=>k.MartialStatus,"1") </td>
</tr>
<tr>
<td style="width:20%;text-align:center" colspan="2"><input type="submit" id="BtnSubmit" value="Submit" /></td>
</tr>
</table>

JQUERY

<pre lang="php">$(document).ready(function () {
        $(&quot;#RoleCode&quot;).change(function () {
            $.get(&quot;/Employee/ActionName&quot;, &quot;Himan&quot;, function (data) {
                alert(data);
            });
        });
    });</pre>

CONTROLER:-

<pre lang="cs">public ActionResult ActionName(string Selected)
        {
            FillDDL();
            var result = new { Success = &quot;True&quot;, Message = &quot;Some Info&quot; };
            return Content(&quot;Himan&quot;);
        }

        public void FillDDL()
        {
            var listItems = new SelectListItem[] {
                            new SelectListItem(){Text=&quot;Corporate&quot;,Value=&quot;c&quot;},
                            new SelectListItem(){Text=&quot;Divisional&quot;,Value=&quot;d&quot;},
                            new SelectListItem(){Text=&quot;Regional&quot;,Value=&quot;r&quot;},
                            new SelectListItem(){Text=&quot;Facility&quot;,Value=&quot;f&quot;},
                            new SelectListItem(){Text=&quot;Resource&quot;,Value=&quot;s&quot;},
            };
            ViewBag.RoleNames = listItems;
        }</pre>