Using Dreamweaver to validate HTTPS

[Race]

My apologies if this is in the wrong forum.

Is it possible for Dreamweaver (on its own or by extension) to tell me what content in a page is not secure?

I have a mess of a website I'm trying to secure and am getting the following error from several of the "https" pages (viewed in Firefox) and need help finding which parts are causing it:

Connection Partially Encrypted
Parts of the page you are viewing were not encrypted before being transmitted over the Internet.

[VIPStephan]

Don't know about validation and I can't say I'm experienced but what I've read is that all images, stylesheets, external files that are included in your page have to have an SSL path too, in order to get a completely secure page, i.e.:

<script src="https://website.com/include.js" type="text/javascript"></script>

<link rel="stylesheet" href="https://website.com/styles.css" type="text/css" />

<img src="https://website.com/image.png" alt="" />