Textbox validation asp.net

[Stephen]

I have the following textbox in the footer of a Datagrid and I'd like to try
and add some client side code too take out all the spaces which the user
might enter by accident. The textbox is used to enter forename text so
basically I need the code to strip out any spaces a user may enter. At the
moment I have two validators and my html code looks as follows: -
Can someone help me enter the code I need to achieve this.
Thanks very much for your help

<FooterTemplate >
<asp:TextBox ID="add_Forenam e" Columns="5" Runat="Server" />

<asp:RequiredFi eldValidator id="rvForename " runat="server" ErrorMessage="A
Forename is required" ControlToValida te="add_Forenam e"
Font-Size="Small">*
</asp:RequiredFie ldValidator>

<asp:regularexp ressionvalidato r id="revlLengthL etter" ForeColor="Red"
Font-Size="Small" runat="server" ErrorMessage="F orename must be more than 2
and less than 25 characters and has to be a letter"
ControlToValida te="add_Forenam e" ValidationExpre ssion="^[A-Za-z]{2,25}$">*
</asp:regularexpr essionvalidator >
</FooterTemplate>