Hey Debbie,
If you want a thank you page, I can give you the ASP code for that in one line. Yep. One measly, stinkin' line.
Code:
Response.Redirect "http://www.your-site.com/thank_you_page.asp"
Put that after you send your email, and replace the page with your own thank you page. Easy, right?
The one thing you need to watch out for, as with ASP in general...make sure you set all objects to nothing BEFORE you process that redirect line. Otherwise, they will take up memory for an unspecified length of time.