This is where the phenomenon of social bookmarking comes into play.
As the range changes frequently it is worth bookmarking the site and checking back to keep up to date with the range.
Consider bookmarking these sites, as you may want to return often.
The standard version gives family and pedigree views, bookmarking capabilities and some charts.
Frames are also disadvantageous for usability as they can cause problems with the back button, printing, history and bookmarking.