Returning to HTTP from HTTPS

Is there a way to "gracefully" return to HTTP from HTTPS without the browser displaying the message: "Warning! Although this document is secure, the information you have submitted is insecure and could be observed by a third party while in transit. If you are submitting passwords, credit card numbers, or other information you would like to keep private, it would be safer for you to cancel the submission." ??? I'd rather it show the other Netscape message: You have requested an insecure document. The document and any information you send back could be observed by a third party while in transit. For more information on security choose Document Information from the View menu. Does anybody have any idea what makes Netscape display one message over another? The above message occurs when I click on a "Submit" button that has a <FORM ACTION="http://mysite.com/nextscript.php3" METHOD="POST" ...> and it passes a session ID in a hidden field to the next script. Although I'm not passing any sensitive information at this point, the message I'm getting might be alarming to users. Thanks! Jerry