Calendar Function Diarise Theme JQuery

Hi,
I’m using Diarise Theme and I’d like to use the function “Add to Calendar” that I have in the Post page by default, to appear in the HomePage below the excerpt of single post.
Here is the site http://thingstodoincalifornia.info/southbay/
Actually I have a Network in WP3 and I pasted some code from Single.php to Index.php
You can see that the Java doesn’t work, I mean it doesn’t hide the calendar options(MS outlook, google cal, apple ical). By default you could click on the button and select which application use to add to calendar, like here http://thingstodoincalifornia.info/longbeach/2010/09/13/wednesday-at-the-theatre/
How to use the same function that I have in the single post?

Finally the funny thing is that in another blog of the same network (so with the same index.php and core files) I can display it in a different way: http://thingstodoincalifornia.info/longbeach/

What’s going on? I’m really in trouble, I probably edited too much code…

Thanks