Coldfusion

In IE if any images or scripts are coming from https I get the warning

This page contains both secure and nonsecure items.

Do you want to display the nonsecure items?

How can tell if the page is in SSL and rewrite the image / script tags

I've been asked to place a recaptcha on a site using coldfusion. I'm using http://recaptcha.riaforge.org/ - ColdFusion reCAPTCHA tag and a quick demo worked perfectly.

But when I place it in my form it appears but none of the info from the captcha seems to be coming through.

I var dumped the form and there were no extra fields at all.

Any pointers here?

I need to get visitors IP and compare against a list of IPs for banning users in coldfusion.