Prototype(javascript) or Ajax?

I'm wondering what would be appropriate for the scenario I have: I am
using the DynamicCalendarHelper which generates a beautiful html
calendar with css. The goal is to be able to click on an individual
day and have the information for that day displayed along side the
calendar. The most similar example I can find is here:

http://rubyonrailsworkshops.com/

but I want to be able to click on a day and have the information for
that day stay presented. I'm not sure if this is a job for ajax or
some javascript library like prototype. This is a very beginner
question, I have no experience with either. Any info is appreciated!
thanks, Dave

I'm wondering what would be appropriate for the scenario I have: I am
using the DynamicCalendarHelper which generates a beautiful html
calendar with css. The goal is to be able to click on an individual
day and have the information for that day displayed along side the
calendar. The most similar example I can find is here:

http://rubyonrailsworkshops.com/

but I want to be able to click on a day and have the information for
that day stay presented. I'm not sure if this is a job for ajax or
some javascript library like prototype. This is a very beginner
question, I have no experience with either. Any info is appreciated!
thanks, Dave

This looks promising. Thanks a lot.