Forum Member Levels?

Can like an admin make it so how long you've been at the forums and how active you are give you levels like this:

HP: This rises and falls according to how active you are.
MP: Shows how long a user has been with the forums and their level of activity.
Experience: Shows how close you are to reaching the next level.
(Every time your experience reaches 100% you get a level up)


I forgot to add that the HP, MP, and EXP. are bars that are under the style you use in your posts.