mod rewrite - Adding an exception to https redirect (mod_rewrite)

I am using the the following script to redirect all requests send to http to https

RewriteEngine On

RewriteCond %{HTTPS} off

RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

I need to add an exception to this rule (for a specific page) for the reason that it's loading a js that it's on a server that does not have https. In FF, Chrome, it works. In IE it displays a nasty warning.

Any ideas on how to add a rule to my existing mod_rewrite code?