They will probably show up in Google, though Google (and other search engines) will have to work a little harder to find them, and it's possible they won't be ranked as well.
But you have a bigger issue at hand. If someone does clicks on one of those pages in a search, that person will see it completely out of context with the rest of the site. This is called orphaned pages, and it will often be a dealbreaker for your visitors. They are likely to not come back because the rest of the site is largely useless to them.
I can't think of a single reason to use IFrames nowadays, with the availability of includes in nearly every server-side scripting language. IFrames are bad for business and should be avoided whenever possible.
Originally posted by Goldfiles I used a script that will auto open the parent frames if the child frames are opened by themselves. no loss of biz
Have you implemented it yet Because I'm still getting the orphaned page.
IFrames are a very poor alternative to using includes and overflow. They simply are not nearly as reliable as more updated, user-friendly techniques for including files within files.