how to set images for navigation using mvcsitemapper

Question

hi to all,
Here for navigation control i used mvcsitemapper.here i finished navigation but i want to set navigation images.
 
DESCRIPTION:-
For home i want to use some images for home navigation control.Here i used imageurl but no change in navigation.Kindle help how to set here i used so many options but no use.so Help me for this task.

For example :-
Here i want like that