Thanks for this smart & simple one.
Almost all the things are here.
Here are a few suggestions from me, if you won't mind-
You can add scroll or something like that as option.
The (hide or show) button style is too nice & handsome.
But, you can add option to add pictures of button as anyone want.
I already installed it in my site. I am facing a prob in Firefox Browser.
Here the (hide or show) button looks different, having some digits(!) ,
When it is hide looks F347 & when open it looks F343...!!!
If you want you can check it out
[ link redacted, please do not post links in the reviews section ]
I know, I can post it in support. But I don't wana go over there again...
Thanks again... Have a nice day..