bgiframe and https secruity message in IE6

bgiframe and https secruity message in IE6

This snippet is to fix an issue in IE6 for z-index over select item drop downs.  Works great, except in https situations.  IE6 says anything in an IFRAME that is not https cause a mixed security and thus a popup about page conatining secure and nonsecure content.  the js library is mapped via https.  Any ideas on how to get around this?