Hi Kathie,
There are some shortcuts suggested when dealing with Ajax, this one for example.
However, in order to properly understand and use Ajax, you need to start with a little Javascript. Learning Javascript basics is essential and it is not very difficult. I recommand O'reilly's Javascript book which will give you some functions, arrays, variable etc. background alongside practical knowledge.
After you get around javascript you should go here - it is one of the most popular and user friendly Ajax toolkits around, and play around with it.
Pay attenton that Ajax is not just about nifty design effects, but mostly about retrieving data and presenting it. this means you should also start thinking about backend programming like ASP, Ruby, or my favorite- PHP.
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