How to select a value from the drop down list

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ASP.NET

Javascript

CSS

jQuery

, +

I have two drop down lists

<td width="75%">
                                    @(Html.Kendo().DropDownList()
                                        .Name("ddlGrade")
                                        .HtmlAttributes(new { style = "width: 250px", @class = "editor-dropdownlist" })
                                        .OptionLabel("Select Grade...")
                                        .DataSource(
                                            dataSource =>
                                            {
                                                dataSource.Read(read => read.Action("ListAttributesBySystemID", "CatalogAttributeType", new { systemID = 16 }));
                                                dataSource.Events(events => events.Change("gradeDataSourceChange"));
                                            }
                                        )
                                        .DataTextField("Title")
                                        .DataValueField("ID")
                                        .Events(events => { events.Change("saveGradeAttribute"); })
                                    )
                                </td>

and

@(Html.Kendo().DropDownList()
                                        .Name("ddlCoinFinish")
                        .HtmlAttributes(new { @class = "editor-dropdownlist" })
                                .OptionLabel("Select...")
                        .DataSource(dataSource =>
                        {
                            dataSource.Read(read => read.Action("ListAttributesBySystemID", "CatalogAttributeType", new { systemID = 46 }));
                            dataSource.Events(events => events.Change("ddlCoinFinishDataSourceChange"));
                        }
                        )
                        .DataTextField("Title")
                        .DataValueField("ID")
                        .Events(events => { events.Change("ddlCoinFinishChange"); })
                    )
                    </td>

with value populating from the database

I want to change the value of the CoinFinish drop down list when changing the grade drop down list.

I have created this java script code

$("#ddlGrade").change(function () {

      if (value == 2279) {
          $('#ddlCoinFinish').val(4393).attr("selected", "selected").change();
          alert("You have Selectedddddd  :: " + $("#ddlGrade").val());
          alert("You have ddlCoinFinish  :: " + $("#ddlCoinFinish").val());
      }
  });

And the second alert box showing the changed (New) value. But there is no change in the UI of the CoinFinish Ddl. Can you please help me.
Thanks In advance.