Should be asp:LinkButton.

>Do you know what should I use to get the appearance of a link (right now it's a button) and also to fix the problem with not well-formed tag. I don't really want to add a separate script on the page, though I can if it's need to be done this way:
>

><ItemTemplate>
>    <asp:Button ID="Button1" runat="server" Text="Remove User From Role" CommandName="RemUser"
>
>      OnClientClick="return confirm('Are you sure you want to remove ' +
>< %# Eval("UserName") % > + ' from ' +
>document.getElementById('< %= drpSelRole.ClientID % >').value + ' role ?');" />
>                </ItemTemplate>