Conditional based on domain name

[fastlaneweb]

Hi there,
I am working to semi-combine two forums while keeping separate identities at the same time. First, let me say I have licenses for both sites.

What phrase would I need to use to detect the domain name of the site so I can display different forums, styles, templates, etc.

I'm thinking it would be something like

<if condition="((THIS_DOMAIN == 'mydomain1.com') >
  display page 1
<if condition="((THIS_DOMAIN == 'mydomain2.com') >
  display page 2

<else />
 Display something else.
</if>

Would this work? I'm about to try it but I'm not sure what phrase would actually check the domain. I made up this_domain based on this_script.

Thanks!