Make Panel visible based on selected item in radio button list?

hi,

I have a radio button list with 2 entries
  <asp:RadioButtonList ID="RadioButtonList6" runat="server" Width="379px">             <asp:ListItem Selected="True" Value="150.00">Up to 2 Songs  £150.00</asp:ListItem>             <asp:ListItem>Other Amount</asp:ListItem>         </asp:RadioButtonList>
If OTHER AMOUNT is selected I want to make Panel1 visible on the page which is currently hidden?

thank you