Change previous and next keyboard bindings

     else if (ev.key == 'k') scrollUp()                  // k   scroll up 3 EMs
     else if (ev.key == 'l') goForward()                 // l   go forward
     else if (ev.key == 'u') goUp()                      // u   follow rel=up
-    else if (ev.key == '[') goPrevious()                // [   follow rel=prev
-    else if (ev.key == ']') goNext()                    // ]   follow rel=next
+    else if (ev.key == 'p') goPrevious()                // p   follow rel=prev
+    else if (ev.key == 'n') goNext()                    // n   follow rel=next
   }, false)
 })