<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="Invalid Format" ControlToValidate="TextBox2" ValidationExpression="^\w{2} \d{2} \w{2} \d{4}" SetFocusOnError="true"> </asp:RegularExpressionValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="Invalid Format" ControlToValidate="TextBox2" ValidationExpression="^\w{2} \d{2} \w{2,} \d{4}" SetFocusOnError="true"> </asp:RegularExpressionValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="Invalid Format" ControlToValidate="TextBox2" ValidationExpression="^[a-zA-z]{2} \d{2} [a-zA-Z]{2,} \d{4}" SetFocusOnError="true"> </asp:RegularExpressionValidator>
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