More often than I like when designers edit some of our sites' pages, they include javascript or an external image our SSL pages that are not encrypted. For example if we have a page like this:

https://www.example.com/cart/EnterCreditCard

And the designer includes some non-encrypted image like this:

<img src='http://www.cardprocessor.com/logo.gif' />

Of course, this creates errors in all browsers:

• IE: Do you want to view only the webpage content that was delivered securely?
• Firefox: Connection Partially Encrypted
• Chrome: (I forget this message)

What I'm looking for is a tool or plugin that lets me easily see what objects are not encrypted. A firefox extension or something along those lines would be great.