How to implement a jquery plugin


I want to implement the jQuery EasyTabs plugin into my CS Cart V 3 Ultimate.

I added to the HEAD section of my skin the required files which are jquery.hashchange.min.js and jquery.easytabs.js and of course the jquery library which is already implemented in cs cart.

Unfortunately it isn't working even if the code seems to be right.

Same code works on local machine, I attach you the html you can easily find the js file on the net.

So, any ideas? Does Cs Cart in some way prevent me to use that? Is there any conflict?

Thanks in advance!