Radio buttons Enable/Disable textboxes

Hi,  I have a asp.net webform with four radio buttons and four associated textboxes.   OnLoad the first radio button and textbox are enabled.  

What I'd like to be able to do is this....  

When a user select another radio button, the textbox associated with that radio button (found in the same row) is enabled and all other textboxes are disabled?  Can you please provide me a JQuery or JavaScript code that will achieve this functionality?

My Table, radio buttons and textboxes are below.  THANKS!

<table>
                <tr>
                    <td>
                        <asp:RadioButton ID="rbtnSpecNumber" runat="server" Text="Spec #" Checked="True" />
                    </td>
                    <td>
                        <asp:TextBox ID="tbSpecNumber" runat="server" Enabled="True"></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:RadioButton ID="rbtnClient" runat="server" Text="Client" />
                    </td>
                    <td>
                        <asp:TextBox ID="tbClient" runat="server" Enabled="false"></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:RadioButton ID="rbtnShow" runat="server" Text="Show"/>
                    </td>
                    <td>
                        <asp:TextBox ID="tbShow" runat="server" Enabled="false"></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:RadioButton ID="rbtnAccountExec" runat="server" Text="Account Exec"/>
                    </td>
                    <td>
                        <asp:TextBox ID="tbAccountExec" runat="server" Enabled="false"></asp:TextBox>
                    </td>
                </tr>
            </table>

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