Very nice, but please don't rely on keys like 'y' being on a certain position on the keyboard – on my German keyboard, for example, it's where the US's 'z' is. Other keyboard layouts are even more different.
If you can't access the physical layout of your keyboard (and using javascript, I'm not sure you can), using the arrow keys for all navigational things is really the best option.
Bertrand Russel – A History of Western Philosophy.
Easily my most favorite non-fiction book. Even though there are some flaws in the treatment of some philosophers (and their models) here and there (esp. 19th Century ones – but it might just be that I'm more familiar with these myself), it's a great read: Well written, thorough, and never shy with his own opinion. The chapter on scholastic philosophy was an eye-opener for me, as was the part about the 11th-Century church reforms.
Before I read this book, I rarely cared about pre-Kantian philosophy, as I thought it to be outdated and not really relevant anymore. Russel encouraged me to re-discover the philosophical models from a cultural-historical point of view – something that sounds obvious to me now, but at the time I discovered the book (in my early twenties) it was not.
If you can't access the physical layout of your keyboard (and using javascript, I'm not sure you can), using the arrow keys for all navigational things is really the best option.