Create a clickable link on selected text

Hi Everyone,

We will be using FCKEditor to allow for basic content management on our site. Some of the pages we have will contain links to public and protected member documents. If an author is editing a page we would like for the following functionality to occur:

1. Select text and click on a custom button that will open a popup window. The popup window will contain a list of documents pulled from our tables.

2. User selects a document - which will return a URL to the file.

3. The returned URL will be applied to the selected text.

4. Once the page is saved, the selected text will now be a clickable link and not be surrounded by <a> tags.

We have created a custom toolbar and button because the existing link button does not meet the needs for this. We are hoping that this can be achieved easily with the custom toolbar. Ideally this should be cross-browser compatible since our understanding is that document.selection is not Firefox supported.

Thank you all in advance for your help