nopCommerce:SimpleTextBox with asp:RegularExpressionValidator

Hi,
I try to implement a RegularExpressionValidator on the Postal code and Phone number field in the AddressEdit.ascx page.
I added RegularExpressionValidator to Customerinfo.ascx page and other pages that contain the Postal code number and / or Phone number and it works.

However in the AddressEdit.ascx page, the phone number and Postal code are defined with nopCommerce:SimpleTextBox.
Why this specific type and why it dosen't herit propreties from the asp:textbox class.
Wich is the best solution to add my validator ?

Thank you .

Here is my solution.
I changer the type of those fields ;)

<asp:TextBox runat="server" ID="txtZipPostalCode"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvZipPostalCode" runat="server" ControlToValidate="txtZipPostalCode"
            ErrorMessage="<% $NopResources:Account.ZipPostalCodeIsRequired %>" ToolTip="<% $NopResources:Account.ZipPostalCodeIsRequired %>"
ValidationGroup="CustomerInfo">*</asp:RequiredFieldValidator>
                                    
<asp:RegularExpressionValidator runat="server"      id="regexptxtZipPostalCode" ControlToValidate="txtZipPostalCode"      
ValidationExpression="^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$"      ErrorMessage = "<% $NopResources:Axial.Message.InvalidPostalCode %>"   Display="Dynamic" />

I have just been having a similar problem with a NumericTextBox.

I added some functionality to my page for TextChanged event and I ended up replacing the NumericTextBox with an ASP:textBox, required and range validation controls on the page.

Then I could test for the validation in my TextChanged event so that the error messages still showed and the funcrtionality in the TextChanged event would only run if both were valid.