keyboard-navigation.js

$(document).keyup(function(e) {
     var url = false;
      // back arrow - previous post
      if (e.which == 37) { url = $('.previous').attr('href'); }
      // forward arrow - next post (unless this post is the most recent one).
      else if (e.which == 39) { url = $('body:not(.latest) .next').attr('href'); }
      // the 'H' key takes you to the homepage.
      else if (e.which == 72) { url = '../'; }
      // Go
      if (url) {
	window.location = url;
      }
});