Graph zoom, highlight, metric disabled on load

Hi

Any one hacked the code to make the graph zoomable or able to highlight a section?

I deal with long routes (example in link) and sometimes being able to see the finer details is helpful for potential riders, especially when it comes to grade.

Also anyone know how I could set the graph so only elevation is shown on load? User then selects grade.

The page I need help with: [log in to see the link]