I have created this jsfiddle with a floating back to to top button.
At the bottom of the page is a footer with 5 headings.
I want to be able to make the button be in a fixed position until reaching footer after which it goes up.
I am trying to imitate the functionality of back to top button at http://www.sony.com/all-electronics
Rather add more below to make it do what I want.
Any help much appreciated.
Thanks in advance.