I have RadGrid with DropDownlist. I am trying to find the value of each
control by loop through using Javascript.  I am getting the findcontrol as
'null'. I have attached OnClientRatingSelectedIndexChanged in code
behind for the dropdownlist 'Drop1'. What could be wrong? I appreciate any
suggestions.
Javascript
                                <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" AlternatingItemStyle-HorizontalAlign="Left"
                               OnNeedDataSource="RadGrid1_NeedDataSource">
                                <MasterTableView DataKeyNames="level_id" PageSize="10">
                                    <Columns>
 <telerik:GridTemplateColumn UniqueName="TemplateColumn" HeaderText="Test"
                                            Visible="true">
                                            <ItemTemplate>
                                                <asp:Panel ID="Panel1" runat="server">
                                                    <asp:DropDownList ID="Drop1" runat="server"                                                                                                                                        AutoPostBack="true">
                                                    </asp:DropDownList>
                                                </asp:Panel>
                                            </ItemTemplate>
                                        </telerik:GridTemplateColumn>
                                  </Columns>
</MasterTableView>
</telerik:RadGrid>Javascript
function OnClientRatingSelectedIndexChanged(arg) {
        var grid = $find("<%=RadGrid1.ClientID %>");
        var MasterTable = grid.get_masterTableView();
        var Rows = MasterTable.get_dataItems();
        for (var i = 0; i < Rows.length; i++) {
            var row = Rows[i];
            var drop1 = row.findControl("Drop1");  
            var val1 = drop1.selectedValue;
        }   

