Arrow Navigation

<script>
$(document).keyup(function(e) {
  if(e.ctrlKey || e.altKey || e.metaKey) return;
    switch(e.keyCode) {
      case 37: // Left arrow
        window.location = "http://questionablecontent.net/view.php?comic=<?php echo $prev; ?>"; break;
      case 39: // Right arrow
        window.location = "http://questionablecontent.net/view.php?comic=<?php echo $next; ?>"; break;
  }
});
</script>