Leo did a good job of pointing out the differences between the two.
But there are very wrong statements that need to be corrected for the benefit of those who simply don't know:
Judo is japanese, jujitsu is brazillian
Judo and JuJitsu are Japanese.
As for the name "Brazilian Jiu-Jitsu" It's a generic term for Jiu-Jitsu practiced in Brazil. It came about as a way of competing with the term "Gracie Jiu-Jitsu". At least thats the story I heard.
ive heard this is because helio gracie was is such a little guy that he had trouble making the standup holds work
Helio focused on groundwork because the Gracie family was taught Kosen Judo (which is focused on groundwork) from Maeda. Supposedly Helio improved the Jiu-Jitsu he learned because of his smaller stature.
judo is more like karate and other standing fighting!
Judo and Karate are nothing alike. Judo, as typically taught in the US, is focused on throws, with very little in the way punching and kicking. Karate is just the opposite.