Correct way to use Find Control

Hi I have created this web form:

<div class id="AccSetup"> <b>Add a Bank Account to your Profile</b> <br/> <br/> <asp:Label ID="AccountNameLabel" runat="server">Account Name (choose a name for this account): </asp:Label> <asp:TextBox ID="AccountNameTextBox" runat="server"></asp:TextBox> <br/> <br/> <asp:Label ID="AccountTypeLabel" runat="server">Account Type: </asp:Label> <br/> <asp:RadioButton ID="AccountTypeRB1" runat="server" Text="Checking Account" GroupName="AccountType" OnCheckedChanged="AccountTypeRB_CheckChanged" AutoPostBack="True"/> <br/> <asp:RadioButton ID="AccountTypeRB2" runat="serve ...