http://teethgrinder.co.uk/open-flash-chart-2/area-hollow.php http://teethgrinder.co.uk/open-flash-chart-2/area-hollow.php The navigation is in the top right...

http://teethgrinder.co.uk/open-flash-chart-2/area-hollow.php http://teethgrinder.co.uk/open-flash-chart-2/area-hollow.php The navigation is in the top right...it's pretty badly designed. The charts themselves are very customizable though, so you can mimic almost any nice chart you've seen by tweaking.