Masking textbox to accept only alphabets asp.net

Question

How do i mask a textbox to accept only alphabets. using ajaxtool kit or regex or javascript (not jquery though). Could i probably filter out numerics and special characters using ajaxtoolkit? Suggestions or answers please. Thanks in advance.

Answer 1

For Ajax Control Toolkit, here is sample code:

<ajaxToolkit:FilteredTextBoxExtender ID="ftbe" runat="server"
    TargetControlID="TextBox3"         
    FilterType="LowercaseLetters, UppercaseLetters" />

For further information, please see:

http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/FilteredTextBox/FilteredTextBox.aspx