Anime - http://www.maxpagesplus.com/zerocustom/SSJ

SSJ- This is the first level of SSJ. Your hair turns Gold and spiky, your eyes turn blue and you form a deep glow. You must have Sajin blood and you must get mad enough to form power to turn SSJ. The first person to turn SSJ is unknown, all we know is that he got mad and killed himself and the planet he was on.

Utlra/Ultimate SSJ- This is the level between SSJ and SSJ 2. Vegeta was the first to reach this level. The only bad thing is that it lacks speed because of the muscles.

SSJ 2- Gohan was the first to turn into this level of SSJ. It was triggered whenn 16(go to anime slang) was killed by Cell. Your hair gets Loger and gets more spikes, and last of all, you form a huge glow.

SSJ 3- Goku was the first to reach this level of SSJ. Your hair gets down to your waist and you get more spikes and a bigger glow.

SSJ 4- Goku was the first to reach this level in DBGT. Vegeta was stronger because Bulma used the Brute Ray. Before you turn to SSJ 4 you must go to Planet Plant and look at the moon and turn into Oozaru.

Mystic SSJ- The Sajin looks just like a normal Sajin but is at SSJ 2. It's a quite odd level os SSJ.

SSJ at Full Power- This happens when you settle down with your powers and adapt to its capactiy. You no longer have a glow but you are still as strong or stronger when you transformed.