ASP formmail tweaks

I have a simple ASP Formmail script. Currently, it is set up so that the recipient email is specified in the form html. I'd like this script to be modified to make use of recipient email aliases, so that the email addresses are baked into the script, and correspond to a number that in turn is used to specify the recipient in the HTML form. This is in order to hide the rec. email address from users. There should be the ability to store multiple email aliases (for multiple html forms) in the script. I would also like the ability to allow users to select from multiple recipients using a drop-down menu, in the html form. Finally, I would like the script to disallow (without any error message or notification) any emails that contain "a href". You can view the existing script at ftp://[login to view URL]