Secure SSL and Non-Encrypted Pages

[Mark]

I am building that requires SSL pages as well as non encrypted pages to
coexist within the same application. I have successfully created a fully
SSL enabled site and a fully non-encrypted site but they are unable to
work with each other (ie. the same application). Does anyone have any
ideas as to how can have files within a certain directory be submitted
securely and when that is finished to return back to non secure mode?

Regards,

Mark