Basically I want to use a query string to determine which template is loaded.

Currently there are only two options, default (null or 0) and ireland(1). In the future we would like to add more to this, so I want to leave room for expansion.

Currently this is what I have, but it doesn't work.

<%
RegID = Request.QueryString("RegID")
if RegID = 1 then
%>
<!--#include virtual="/template/template_top_ireland.asp"-->
<%
else
%>
<!--#include virtual="/template/template_top.asp"-->
<%

end if
%>

Remember that Include files are processed before the ASP Script - so read through your code as if the include lines had already been replaced by the code and see if it still mkes sense.

It may be that you've declared the same variable in each include file...

Yes, both my includes are almost identical, containing many of the same variables. They do not however set any variables or controls for the rest of the site. So I guess that means I can't use includes in this way. So my next question is there perhaps a better way to do it? The files I was including basically setup the tables that the page is laid-out in, and specify what style sheet to use.

Check out chrishirst post on this thread:
http://webmaster-talk.com/showthread.php?t=30841

D