i already play bass guitar so i have some experiance. but i want to play electric for jazz in school next year, but i have to be really good.
so is it possible to learn electric guitar over the summer?
Considering you already play bass, you shouldn't find guitar too hard. However, I play both and find bass to be a lot easier, but that's just my personal opinion. When it comes to learning guitar, its best to start with proper technique. If you form bad habits its going to be tough to break them. But I'm sure you are already good at picking and fretting because you play bass.
There are a lot of free resources on the web, such as http://www.wholenote.com but because you are a true newbie at guitar you will probably want to invest in lessons. I personally went to an instructor that lived down the street, but you might not have that same convenience. My friend bought a program online and it allowed him to get really good really fast. He's even better than me now 
http://0406eemcqa7v6q9fnbwhffcse7.hop.clickbank.net/ is the program he used. They have a lot of testimonials and information on the site, and its rather inexpensive for a whole year's worth of lessons, which i believe (but not sure) you can go through at any pace. Perfect for your situation, because you want to learn a lot fast!
hope you get the spot in the band!