Just a quick thought... As I scroll through the posts, this subject seems to pop-up (pardon the pun) often...

I know many of you are aware of XARAXHRIS' course. But for those who may not, maybe this would make a nice bookmark.

0:15:36 - POPUP LAYERS: Overview
0:16:06 - POPUP LAYERS: Creating calling objects and layers
0:16:57 - POPUP LAYERS: Reveal on click and auto close
0:18:32 - POPUP LAYERS: Reveal on mouse over and auto close
0:19:33 - POPUP LAYERS: Popup text label
0:20:19 - POPUP LAYERS: Lock layers and (lock) command
0:21:59 - POPUP LAYERS: Limit text repelling within popup layer only

And one more 'Oldie but Goodie': How to Create a Popup Layer Manually

Hope this is helpful for some...

Cliff