option HeightStyle for accordion

option HeightStyle for accordion

Hello,
in my accordion I don't manage to change the option HeightStyle .. I would like a "content" behavior ( the height of the accordion must be as tall its content) but it is still the height of the taller one.

my example is there :  http://perso.univ-mlv.fr/larrieu/bib/test.html

thanks.
mloiz