Anything for "citations" or mouse-over boxes?
 

I mean something like...

Say you hover the mouse cursor over this text, a text bubble appears above it with extra information. Is there anything similar to this? It would be handy for adding extra titbits of information to a post without creating extra clutter. And as said in the title, it could also be used to cite an external website, or other uses.

Just thought I'd ask. Thanks.

Most HTML elements can be given a "title" attribute that can contain text that is displayed by a user's browser in a "popup"element. You could create a custom BB Code to do that...say you wanted to used [title][/title] tags, then the replacement code could be:

And then when posting, your users could enter something like:

[title=Tooltip text is here]displayed text is here[/title]

And the "displayed text is here" would have a dotted border along the bottom to indicate it has a tooltip, and when hovering the mouse cursor over this text, the cursor would change to the help cursor and the text ""Tooltip text is here" will display in the popup.