NTLM Detect Trusted Sites in Client Browser

Hi!

I am looking for a way to inform users when there missing components in their browser trying to reach one of our internal resources. One of the components I am stuck is detecting if the client's browser has our company domain in their trusted Local Intranet list (for example: https://*.domain.com). Sometimes they forget using the https and just add http. (I know, with AD and some policies would be more easier...:-)...)

So, the question is how I can "detect" if in fact the domain is defined under

    **Local Intranet->Sites->Advanced->Websites** 

Thank you

J