<asp:LinkButton Id="linkButton" Runat="server" CommandName="Report" ValidationGroup="group1">
<asp:LinkButton Id="linkButton2" Runat="server" CommandName="Report" ValidationGroup="group2">
<asp:TextBox Id="txtStart" Runat="server" MaxLength="11" Width="100"></asp:TextBox>
<asp:TextBox Id="txtEnd" Runat="server" MaxLength="11" Width="100"></asp:TextBox>
<asp:RequiredFieldValidator Id="reqB" Runat="server" ValidationGroup="group1" ControlToValidate="txtEnd" ErrorMessage="Please enter an End Date">*</asp:RequiredFieldValidator>
<asp:CustomValidator Id="startValB" Runat="server" ErrorMessage="Please enter a valid End Date (mm/dd/yy)">*</asp:CustomValidator>
<asp:CustomValidator Id="endValB" Runat="server" ErrorMessage="End Date must be greater than or equal to the Start Date">*</asp:CustomValidator><br>
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