Hello,

I have error in IE7 that tells that access denied to http://<url>/pie.htc when I access using https. If I use in css "url(https://<url>/js/PIE.php)" instead of just "url(js/PIE.php)" then error disappears but it stop working by http. I'd like to have css file that work both on http and https. Is there a way to do this?

Omit the protocol and it will use the protocol of the current page.

behavior: url(//<url>/js/PIE.php);

See http://paulirish.com/2010/the-protocol-relative-url/

...or just a root-relative url:

behavior: url(/path/to/PIE.htc);

Using //<url>/js/pie.htc and /js/pie.htc has same effect - http://clip2net.com/s/2bP3Z

Do you have any other scripts or polyfills on your page that might be rewriting the behavior url to add http onto it? What does IE's web inspector show you for the value of the behavior property? Have you used a proxy like Fiddler to see what http requests are being made?