2 pt question about Holy Roman Empire?

the first roman emporer was charlemgane appointed by the pope in 800 ad. the last roman emporer was francis the second whom abdicated the throne during the napoleonic wars in 1806. i think the pope chose them all, so i dont think it is hereditary. on wikipedia you can read more about it a href="http://en.wikipedia.org/wiki/Holy_roman_emporer#Succession" rel="nofollow"http://en.wikipedia.org/wiki/Holy_roman_…/a