[dlang website] Up Arrow in library

[Chris via Digitalmars-d]

A small suggestion for the library layout (phobos etc) on 
dlang.org:

An up arrow like on duckduckgo would be cool, i.e. as soon as you 
scroll down an up arrow appears that brings you back to the top, 
if you click on it. This would be very convenient when browsing 
through the library. Would it be hard to add this feature? If 
needs be, I could write a JS function for that.