Need help with the Google Calendar Helper

Need help,

Firstly, I've gone through all the web sites and searched all the
blogs/forums etc and cannot find what I'm after.
I'm a bit of a newbie to all this, but I need to create a link to my
google calendar and display events in a div as a user rolls over the
calendar date, much like this link: http://rubyonrailsworkshops.com/

Now, I can get the calendar to display, no problems there, but I've no
clue how to make it do anything more, and all the API's etc, just mean
nothing to me at all, sorry but I just don't understand them. Can
anyone provide some small amount of code that you may have implemented
something similar, so I can try to deconstruct it?

I spent a few hours so far trying to find something on this, but cannot
find anything, any help would be really appreciated.

Thanks in advance,
Cam