ipod question

so i just got an ipod nano and i wanted to put a couple pictures on it and it wouldn't let me because they were jpg. so can anyone tell me what format my pictures have to be in order to put them onto this stupid thing

don't bother telling me to check the manual because i got it used . . .meaning i didn't get a manual.

fucking christ i hate this 100 word minimum because i have to write extra stuff that don't have to do with anything . . .fuckers its still too short i just need eight more words then i can post