[SOLVED] is possible to give each widget header a different background pic?

i want to add a little background graphic to the right edge of each widget. the graphics are all the same size and configuration, but i want to make a class(?) for each widget so i can specify which graphic goes in each.

is this possible? if so, any tips or tricks to get me heading in the right direction? i'm pretty good with html and css, but wordpress in general and theme customization specifically are both fairly new to me...and i know nothing about [hp.

thanks in advance. :-)