pointer-events

[Trevorhawes]

I would suggest you give id arrowchat_base css of not only transparent but pointer_events:none, to allow people to click through to below, and then ensure than anything on top of that has active pointer-events so you can click them.
This would be easier if everything that shows on arrowchat_base were on another parent div.

This allows us to show just the small (and increasing) chat bar while still allowing people to click on things at the bottom of the page, withou having to use up the whole bottom line for what may be a rarely used single chat box