Forums / Cotonti / Support / Button Option

Good Evening,
I want to insert a button in my SITE under the LeetLogin plugin changing when a user go up a level...
Example:

Guest: Register
After my confirmation the Button change in "Download Mission 1" - Members ( Lvl 10 ) -->
After 20 hours of fly - Lieutenant ( Lvl 15 ) --> the Button change in "Download Mission 2"
After 50 hours of Fly - Captain ( Lvl 20 ) --> the Button change in "Download Mission 3"

I can add this ? If yes, how ?

p.s. sorry for my English...

Thanks for all.